Packages

  • package root

    This is the documentation for the Scala standard library.

    This is the documentation for the Scala standard library.

    Package structure

    The scala package contains core types like Int, Float, Array or Option which are accessible in all Scala compilation units without explicit qualification or imports.

    Notable packages include:

    Other packages exist. See the complete list on the right.

    Additional parts of the standard library are shipped as separate libraries. These include:

    • scala.reflect - Scala's reflection API (scala-reflect.jar)
    • scala.xml - XML parsing, manipulation, and serialization (scala-xml.jar)
    • scala.swing - A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)
    • scala.util.parsing - Parser combinators (scala-parser-combinators.jar)

    Automatic imports

    Identifiers in the scala package and the scala.Predef object are always in scope by default.

    Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example, List is an alias for scala.collection.immutable.List.

    Other aliases refer to classes provided by the underlying platform. For example, on the JVM, String is an alias for java.lang.String.

    Definition Classes
    root
  • package scala

    Core Scala types.

    Core Scala types. They are always available without an explicit import.

    Definition Classes
    root
  • package sys

    The package object scala.sys contains methods for reading and altering core aspects of the virtual machine as well as the world outside of it.

    The package object scala.sys contains methods for reading and altering core aspects of the virtual machine as well as the world outside of it.

    Definition Classes
    scala
    Version

    2.9

    Since

    2.9

  • package process

    This package handles the execution of external processes.

    This package handles the execution of external processes. The contents of this package can be divided in three groups, according to their responsibilities:

    • Indicating what to run and how to run it.
    • Handling a process input and output.
    • Running the process.

    For simple uses, the only group that matters is the first one. Running an external command can be as simple as "ls".!, or as complex as building a pipeline of commands such as this:

    import scala.sys.process._
"ls" #| "grep .scala" #&& Seq("sh", "-c", "scalac *.scala") #|| "echo nothing found" lineStream

    We describe below the general concepts and architecture of the package, and then take a closer look at each of the categories mentioned above.

    Concepts and Architecture

    The underlying basis for the whole package is Java's Process and ProcessBuilder classes. While there's no need to use these Java classes, they impose boundaries on what is possible. One cannot, for instance, retrieve a process id for whatever is executing.

    When executing an external process, one can provide a command's name, arguments to it, the directory in which it will be executed and what environment variables will be set. For each executing process, one can feed its standard input through a java.io.OutputStream, and read from its standard output and standard error through a pair of java.io.InputStream. One can wait until a process finishes execution and then retrieve its return value, or one can kill an executing process. Everything else must be built on those features.

    This package provides a DSL for running and chaining such processes, mimicking Unix shells ability to pipe output from one process to the input of another, or control the execution of further processes based on the return status of the previous one.

    In addition to this DSL, this package also provides a few ways of controlling input and output of these processes, going from simple and easy to use to complex and flexible.

    When processes are composed, a new ProcessBuilder is created which, when run, will execute the ProcessBuilder instances it is composed of according to the manner of the composition. If piping one process to another, they'll be executed simultaneously, and each will be passed a ProcessIO that will copy the output of one to the input of the other.

    What to Run and How

    The central component of the process execution DSL is the scala.sys.process.ProcessBuilder trait. It is ProcessBuilder that implements the process execution DSL, that creates the scala.sys.process.Process that will handle the execution, and return the results of such execution to the caller. We can see that DSL in the introductory example: #|, #&& and #!! are methods on ProcessBuilder used to create a new ProcessBuilder through composition.

    One creates a ProcessBuilder either through factories on the scala.sys.process.Process's companion object, or through implicit conversions available in this package object itself. Implicitly, each process is created either out of a String, with arguments separated by spaces -- no escaping of spaces is possible -- or out of a scala.collection.Seq, where the first element represents the command name, and the remaining elements are arguments to it. In this latter case, arguments may contain spaces.

    To further control what how the process will be run, such as specifying the directory in which it will be run, see the factories on scala.sys.process.Process's object companion.

    Once the desired ProcessBuilder is available, it can be executed in different ways, depending on how one desires to control its I/O, and what kind of result one wishes for:

    • Return status of the process (! methods)
    • Output of the process as a String (!! methods)
    • Continuous output of the process as a Stream[String] (lineStream methods)
    • The Process representing it (run methods)

    Some simple examples of these methods:

    import scala.sys.process._

// This uses ! to get the exit code
def fileExists(name: String) = Seq("test", "-f", name).! == 0

// This uses !! to get the whole result as a string
val dirContents = "ls".!!

// This "fire-and-forgets" the method, which can be lazily read through
// a Stream[String]
def sourceFilesAt(baseDir: String): Stream[String] = {
  val cmd = Seq("find", baseDir, "-name", "*.scala", "-type", "f")
  cmd.lineStream
}

    We'll see more details about controlling I/O of the process in the next section.

    Handling Input and Output

    In the underlying Java model, once a Process has been started, one can get java.io.InputStream and java.io.OutputStream representing its output and input respectively. That is, what one writes to an OutputStream is turned into input to the process, and the output of a process can be read from an InputStream -- of which there are two, one representing normal output, and the other representing error output.

    This model creates a difficulty, which is that the code responsible for actually running the external processes is the one that has to take decisions about how to handle its I/O.

    This package presents an alternative model: the I/O of a running process is controlled by a scala.sys.process.ProcessIO object, which can be passed _to_ the code that runs the external process. A ProcessIO will have direct access to the java streams associated with the process I/O. It must, however, close these streams afterwards.

    Simpler abstractions are available, however. The components of this package that handle I/O are:

    Some examples of I/O handling:

    import scala.sys.process._

// An overly complex way of computing size of a compressed file
def gzFileSize(name: String) = {
  val cat = Seq("zcat", name)
  var count = 0
  def byteCounter(input: java.io.InputStream) = {
    while(input.read() != -1) count += 1
    input.close()
  }
  val p = cat run new ProcessIO(_.close(), byteCounter, _.close())
  p.exitValue()
  count
}

// This "fire-and-forgets" the method, which can be lazily read through
// a Stream[String], and accumulates all errors on a StringBuffer
def sourceFilesAt(baseDir: String): (Stream[String], StringBuffer) = {
  val buffer = new StringBuffer()
  val cmd = Seq("find", baseDir, "-name", "*.scala", "-type", "f")
  val lineStream = cmd lineStream_! ProcessLogger(buffer append _)
  (lineStream, buffer)
}

    Instances of the java classes java.io.File and java.net.URL can both be used directly as input to other processes, and java.io.File can be used as output as well. One can even pipe one to the other directly without any intervening process, though that's not a design goal or recommended usage. For example, the following code will copy a web page to a file:

    import java.io.File
import java.net.URL
import scala.sys.process._
new URL("http://www.scala-lang.org/") #> new File("scala-lang.html") !

    More information about the other ways of controlling I/O can be found in the Scaladoc for the associated objects, traits and classes.

    Running the Process

    Paradoxically, this is the simplest component of all, and the one least likely to be interacted with. It consists solely of scala.sys.process.Process, and it provides only two methods:

    • exitValue(): blocks until the process exit, and then returns the exit value. This is what happens when one uses the ! method of ProcessBuilder.
    • destroy(): this will kill the external process and close the streams associated with it.
    Definition Classes
    sys
  • BooleanProp
  • Prop
  • ShutdownHookThread
  • SystemProperties

class SystemProperties extends AbstractMap[String, String] with Map[String, String]

A bidirectional map wrapping the java System properties. Changes to System properties will be immediately visible in the map, and modifications made to the map will be immediately applied to the System properties. If a security manager is in place which prevents the properties from being read or written, the AccessControlException will be caught and discarded.

Source
SystemProperties.scala
Linear Supertypes
AbstractMap[String, String], Map[String, String], MapLike[String, String, Map[String, String]], collection.mutable.Cloneable[Map[String, String]], Cloneable, java.lang.Cloneable, Shrinkable[String], Builder[(String, String), Map[String, String]], Growable[(String, String)], Clearable, collection.mutable.Iterable[(String, String)], collection.mutable.Traversable[(String, String)], Mutable, AbstractMap[String, String], Map[String, String], MapLike[String, String, Map[String, String]], Subtractable[String, Map[String, String]], PartialFunction[String, String], (String) ⇒ String, GenMap[String, String], GenMapLike[String, String, Map[String, String]], AbstractIterable[(String, String)], collection.Iterable[(String, String)], IterableLike[(String, String), Map[String, String]], Equals, GenIterable[(String, String)], GenIterableLike[(String, String), Map[String, String]], AbstractTraversable[(String, String)], collection.Traversable[(String, String)], GenTraversable[(String, String)], GenericTraversableTemplate[(String, String), collection.mutable.Iterable], TraversableLike[(String, String), Map[String, String]], GenTraversableLike[(String, String), Map[String, String]], Parallelizable[(String, String), ParMap[String, String]], collection.TraversableOnce[(String, String)], GenTraversableOnce[(String, String)], FilterMonadic[(String, String), Map[String, String]], HasNewBuilder[(String, String), Map[String, String]], AnyRef, Any
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. SystemProperties
  2. AbstractMap
  3. Map
  4. MapLike
  5. Cloneable
  6. Cloneable
  7. Cloneable
  8. Shrinkable
  9. Builder
  10. Growable
  11. Clearable
  12. Iterable
  13. Traversable
  14. Mutable
  15. AbstractMap
  16. Map
  17. MapLike
  18. Subtractable
  19. PartialFunction
  20. Function1
  21. GenMap
  22. GenMapLike
  23. AbstractIterable
  24. Iterable
  25. IterableLike
  26. Equals
  27. GenIterable
  28. GenIterableLike
  29. AbstractTraversable
  30. Traversable
  31. GenTraversable
  32. GenericTraversableTemplate
  33. TraversableLike
  34. GenTraversableLike
  35. Parallelizable
  36. TraversableOnce
  37. GenTraversableOnce
  38. FilterMonadic
  39. HasNewBuilder
  40. AnyRef
  41. Any
Implicitly
  1. by systemPropertiesToCompanion
  2. by CollectionsHaveToParArray
  3. by MonadOps
  4. by any2stringadd
  5. by StringFormat
  6. by Ensuring
  7. by ArrowAssoc
  8. by alternateImplicit
  1. Hide All
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new SystemProperties()

Type Members

  1. class DefaultKeySet extends AbstractSet[K] with Set[K] with Serializable

    The implementation class of the set returned by keySet.

    The implementation class of the set returned by keySet.

    Attributes
    protected
    Definition Classes
    MapLike
  2. class DefaultValuesIterable extends AbstractIterable[V] with Iterable[V] with Serializable

    The implementation class of the iterable returned by values.

    The implementation class of the iterable returned by values.

    Attributes
    protected
    Definition Classes
    MapLike
  3. class FilteredKeys extends AbstractMap[K, V] with DefaultMap[K, V]
    Attributes
    protected
    Definition Classes
    MapLike
  4. class MappedValues[W] extends AbstractMap[K, W] with DefaultMap[K, W]
    Attributes
    protected
    Definition Classes
    MapLike
  5. class WithFilter extends FilterMonadic[A, Repr]

    A class supporting filtered operations.

    A class supporting filtered operations. Instances of this class are returned by method withFilter.

    Definition Classes
    TraversableLike
  6. type Self = Map[String, String]

    The type implementing this traversable

    The type implementing this traversable

    Attributes
    protected[this]
    Definition Classes
    TraversableLike

Value Members

  1. final def !=(arg0: Any): Boolean

    Test two objects for inequality.

    Test two objects for inequality.

    returns

    true if !(this == that), false otherwise.

    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

    Equivalent to x.hashCode except for boxed numeric types and null.

    Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.

    returns

    a hash value consistent with ==

    Definition Classes
    AnyRef → Any
  3. def +[V1 >: String](elem1: (String, V1), elem2: (String, V1), elems: (String, V1)*): Map[String, V1]

    Creates a new map containing two or more key/value mappings and all the key/value mappings of this map.

    Creates a new map containing two or more key/value mappings and all the key/value mappings of this map.

    Specified mappings will override existing mappings from this map with the same keys.

    V1

    the type of the added values

    elem1

    the first element to add.

    elem2

    the second element to add.

    elems

    the remaining elements to add.

    returns

    a new map containing mappings of this map and two or more specified mappings.

    Definition Classes
    MapLike → MapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) + creates a new map. Use += to add an element to this map and return that map itself.

  4. def +[V1 >: String](kv: (String, V1)): Map[String, V1]

    Creates a new map containing a new key/value mapping and all the key/value mappings of this map.

    Creates a new map containing a new key/value mapping and all the key/value mappings of this map.

    Mapping kv will override existing mappings from this map with the same key.

    V1

    the type of the value in the key/value pair.

    kv

    the key/value mapping to be added

    returns

    a new map containing mappings of this map and the mapping kv.

    Definition Classes
    MapLike → MapLike → GenMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) + creates a new map. Use += to add an element to this map and return that map itself.

  5. def ++[V1 >: String](xs: GenTraversableOnce[(String, V1)]): Map[String, V1]

    Creates a new map containing the key/value mappings provided by the specified traversable object and all the key/value mappings of this map.

    Creates a new map containing the key/value mappings provided by the specified traversable object and all the key/value mappings of this map.

    Note that existing mappings from this map with the same key as those in xs will be overridden.

    V1

    the type of the added values

    xs

    the traversable object.

    returns

    a new map containing mappings of this map and those provided by xs.

    Definition Classes
    MapLike → MapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) ++ creates a new map. Use ++= to add an element to this map and return that map itself.

  6. def ++[B >: (String, String), That](that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Map[String, String], B, That]): That

    Returns a new traversable collection containing the elements from the left hand operand followed by the elements from the right hand operand.

    Returns a new traversable collection containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the traversable collection is the most specific superclass encompassing the element types of the two operands.

    B

    the element type of the returned collection.

    That

    the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.

    that

    the traversable to append.

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.

    returns

    a new collection of type That which contains all elements of this traversable collection followed by all elements of that.

    Definition Classes
    TraversableLike → GenTraversableLike
  7. def ++:[B >: (String, String), That](that: collection.Traversable[B])(implicit bf: CanBuildFrom[Map[String, String], B, That]): That

    As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

    As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

    It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.

    Example:

    scala> val x = List(1)
x: List[Int] = List(1)

scala> val y = LinkedList(2)
y: scala.collection.mutable.LinkedList[Int] = LinkedList(2)

scala> val z = x ++: y
z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)

    This overload exists because: for the implementation of ++: we should reuse that of ++ because many collections override it with more efficient versions.

    Since TraversableOnce has no ++ method, we have to implement that directly, but Traversable and down can use the overload.

    B

    the element type of the returned collection.

    That

    the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.

    that

    the traversable to append.

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.

    returns

    a new collection of type That which contains all elements of this traversable collection followed by all elements of that.

    Definition Classes
    TraversableLike
  8. def ++:[B](that: collection.TraversableOnce[B]): Map[B]

    [use case] As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

    [use case]

    As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

    It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.

    Example:

    scala> val x = List(1)
x: List[Int] = List(1)

scala> val y = LinkedList(2)
y: scala.collection.mutable.LinkedList[Int] = LinkedList(2)

scala> val z = x ++: y
z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)
    B

    the element type of the returned collection.

    that

    the traversable to append.

    returns

    a new mutable map which contains all elements of this mutable map followed by all elements of that.

    Definition Classes
    TraversableLike
    Full Signature

    def ++:[B >: (String, String), That](that: collection.TraversableOnce[B])(implicit bf: CanBuildFrom[Map[String, String], B, That]): That

  9. def ++=(xs: collection.TraversableOnce[(String, String)]): SystemProperties.this.type

    adds all elements produced by a TraversableOnce to this growable collection.

    adds all elements produced by a TraversableOnce to this growable collection.

    xs

    the TraversableOnce producing the elements to add.

    returns

    the growable collection itself.

    Definition Classes
    Growable
  10. def +=(kv: (String, String)): SystemProperties.this.type

    Adds a new key/value pair to this map.

    Adds a new key/value pair to this map. If the map already contains a mapping for the key, it will be overridden by the new value.

    kv

    the key/value pair.

    returns

    the map itself

    Definition Classes
    SystemProperties → MapLike → Builder → Growable
  11. def +=(elem1: (String, String), elem2: (String, String), elems: (String, String)*): SystemProperties.this.type

    adds two or more elements to this growable collection.

    adds two or more elements to this growable collection.

    elem1

    the first element to add.

    elem2

    the second element to add.

    elems

    the remaining elements to add.

    returns

    the growable collection itself

    Definition Classes
    Growable
  12. def -(elem1: String, elem2: String, elems: String*): Map[String, String]

    Creates a new map with all the key/value mappings of this map except mappings with keys equal to any of the two or more specified keys.

    Creates a new map with all the key/value mappings of this map except mappings with keys equal to any of the two or more specified keys.

    elem1

    the first element to remove.

    elem2

    the second element to remove.

    elems

    the remaining elements to remove.

    returns

    a new map containing all the mappings of this map except mappings with a key equal to elem1, elem2 or any of elems.

    Definition Classes
    MapLike → Subtractable
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) - creates a new map. Use -= to remove an element from this map and return that map itself.

  13. def -(key: String): Map[String, String]

    Creates a new map with all the key/value mappings of this map except the key/value mapping with the specified key.

    Creates a new map with all the key/value mappings of this map except the key/value mapping with the specified key.

    key

    the key to be removed

    returns

    a new map with all the mappings of this map except that with a key key.

    Definition Classes
    MapLike → MapLike → Subtractable → GenMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) - creates a new map. Use -= to remove an element from this map and return that map itself.

  14. def --(xs: GenTraversableOnce[String]): Map[String, String]

    Creates a new map with all the key/value mappings of this map except mappings with keys equal to any of those provided by the specified traversable object.

    Creates a new map with all the key/value mappings of this map except mappings with keys equal to any of those provided by the specified traversable object.

    xs

    the traversable object.

    returns

    a new map with all the key/value mappings of this map except mappings with a key equal to a key from xs.

    Definition Classes
    MapLike → Subtractable
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) -- creates a new map. Use --= to remove an element from this map and return that map itself.

  15. def --=(xs: collection.TraversableOnce[String]): SystemProperties.this.type

    Removes all elements produced by an iterator from this shrinkable collection.

    Removes all elements produced by an iterator from this shrinkable collection.

    xs

    the iterator producing the elements to remove.

    returns

    the shrinkable collection itself

    Definition Classes
    Shrinkable
  16. def -=(key: String): SystemProperties.this.type

    Removes a key from this map.

    Removes a key from this map.

    key

    the key to be removed

    returns

    the map itself.

    Definition Classes
    SystemProperties → MapLike → Shrinkable
  17. def -=(elem1: String, elem2: String, elems: String*): SystemProperties.this.type

    Removes two or more elements from this shrinkable collection.

    Removes two or more elements from this shrinkable collection.

    elem1

    the first element to remove.

    elem2

    the second element to remove.

    elems

    the remaining elements to remove.

    returns

    the shrinkable collection itself

    Definition Classes
    Shrinkable
  18. def ->[B](y: B): (SystemProperties, B)
    Implicit
    This member is added by an implicit conversion from SystemProperties to ArrowAssoc[SystemProperties] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  19. def /:[B](z: B)(op: (B, (String, String)) ⇒ B): B

    Applies a binary operator to a start value and all elements of this traversable or iterator, going left to right.

    Applies a binary operator to a start value and all elements of this traversable or iterator, going left to right.

    Note: /: is alternate syntax for foldLeft; z /: xs is the same as xs foldLeft z.

    Examples:

    Note that the folding function used to compute b is equivalent to that used to compute c.

    scala> val a = List(1,2,3,4)
a: List[Int] = List(1, 2, 3, 4)

scala> val b = (5 /: a)(_+_)
b: Int = 15

scala> val c = (5 /: a)((x,y) => x + y)
c: Int = 15

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

    B

    the result type of the binary operator.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this traversable or iterator, going left to right with the start value z on the left:

    op(...op(op(z, x_1), x_2), ..., x_n)

    where x1, ..., xn are the elements of this traversable or iterator.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  20. def :\[B](z: B)(op: ((String, String), B) ⇒ B): B

    Applies a binary operator to all elements of this traversable or iterator and a start value, going right to left.

    Applies a binary operator to all elements of this traversable or iterator and a start value, going right to left.

    Note: :\ is alternate syntax for foldRight; xs :\ z is the same as xs foldRight z.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

    Examples:

    Note that the folding function used to compute b is equivalent to that used to compute c.

    scala> val a = List(1,2,3,4)
a: List[Int] = List(1, 2, 3, 4)

scala> val b = (a :\ 5)(_+_)
b: Int = 15

scala> val c = (a :\ 5)((x,y) => x + y)
c: Int = 15
    B

    the result type of the binary operator.

    z

    the start value

    op

    the binary operator

    returns

    the result of inserting op between consecutive elements of this traversable or iterator, going right to left with the start value z on the right:

    op(x_1, op(x_2, ... op(x_n, z)...))

    where x1, ..., xn are the elements of this traversable or iterator.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  21. final def ==(arg0: Any): Boolean

    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Definition Classes
    AnyRef → Any
  22. def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder

    Appends all bindings of this map to a string builder using start, end, and separator strings.

    Appends all bindings of this map to a string builder using start, end, and separator strings. The written text begins with the string start and ends with the string end. Inside, the string representations of all bindings of this map in the form of key -> value are separated by the string sep.

    b

    the builder to which strings are appended.

    start

    the starting string.

    sep

    the separator string.

    end

    the ending string.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    MapLike → TraversableOnce
  23. def addString(b: StringBuilder): StringBuilder

    Appends all elements of this traversable or iterator to a string builder.

    Appends all elements of this traversable or iterator to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this traversable or iterator without any separator string.

    Example:

    scala> val a = List(1,2,3,4)
a: List[Int] = List(1, 2, 3, 4)

scala> val b = new StringBuilder()
b: StringBuilder =

scala> val h = a.addString(b)
h: StringBuilder = 1234
    b

    the string builder to which elements are appended.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    TraversableOnce
  24. def addString(b: StringBuilder, sep: String): StringBuilder

    Appends all elements of this traversable or iterator to a string builder using a separator string.

    Appends all elements of this traversable or iterator to a string builder using a separator string. The written text consists of the string representations (w.r.t. the method toString) of all elements of this traversable or iterator, separated by the string sep.

    Example:

    scala> val a = List(1,2,3,4)
a: List[Int] = List(1, 2, 3, 4)

scala> val b = new StringBuilder()
b: StringBuilder =

scala> a.addString(b, ", ")
res0: StringBuilder = 1, 2, 3, 4
    b

    the string builder to which elements are appended.

    sep

    the separator string.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    TraversableOnce
  25. def aggregate[B](z: ⇒ B)(seqop: (B, (String, String)) ⇒ B, combop: (B, B) ⇒ B): B

    Aggregates the results of applying an operator to subsequent elements.

    Aggregates the results of applying an operator to subsequent elements.

    This is a more general form of fold and reduce. It is similar to foldLeft in that it doesn't require the result to be a supertype of the element type. In addition, it allows parallel collections to be processed in chunks, and then combines the intermediate results.

    aggregate splits the traversable or iterator into partitions and processes each partition by sequentially applying seqop, starting with z (like foldLeft). Those intermediate results are then combined by using combop (like fold). The implementation of this operation may operate on an arbitrary number of collection partitions (even 1), so combop may be invoked an arbitrary number of times (even 0).

    As an example, consider summing up the integer values of a list of chars. The initial value for the sum is 0. First, seqop transforms each input character to an Int and adds it to the sum (of the partition). Then, combop just needs to sum up the intermediate results of the partitions:

    List('a', 'b', 'c').aggregate(0)({ (sum, ch) => sum + ch.toInt }, { (p1, p2) => p1 + p2 })
    B

    the type of accumulated results

    z

    the initial value for the accumulated result of the partition - this will typically be the neutral element for the seqop operator (e.g. Nil for list concatenation or 0 for summation) and may be evaluated more than once

    seqop

    an operator used to accumulate results within a partition

    combop

    an associative operator used to combine results from different partitions

    Definition Classes
    TraversableOnce → GenTraversableOnce
  26. def andThen[C](k: (String) ⇒ C): PartialFunction[String, C]

    Composes this partial function with a transformation function that gets applied to results of this partial function.

    Composes this partial function with a transformation function that gets applied to results of this partial function.

    C

    the result type of the transformation function.

    k

    the transformation function

    returns

    a partial function with the same domain as this partial function, which maps arguments x to k(this(x)).

    Definition Classes
    PartialFunction → Function1
  27. def apply(key: String): String

    Retrieves the value which is associated with the given key.

    Retrieves the value which is associated with the given key. This method invokes the default method of the map if there is no mapping from the given key to a value. Unless overridden, the default method throws a NoSuchElementException.

    key

    the key

    returns

    the value associated with the given key, or the result of the map's default method, if none exists.

    Definition Classes
    MapLike → GenMapLike → Function1
  28. def applyOrElse[K1 <: String, V1 >: String](x: K1, default: (K1) ⇒ V1): V1

    Applies this partial function to the given argument when it is contained in the function domain.

    Applies this partial function to the given argument when it is contained in the function domain. Applies fallback function where this partial function is not defined.

    Note that expression pf.applyOrElse(x, default) is equivalent to

    if(pf isDefinedAt x) pf(x) else default(x)

    except that applyOrElse method can be implemented more efficiently. For all partial function literals the compiler generates an applyOrElse implementation which avoids double evaluation of pattern matchers and guards. This makes applyOrElse the basis for the efficient implementation for many operations and scenarios, such as:

    • combining partial functions into orElse/andThen chains does not lead to excessive apply/isDefinedAt evaluation
    • lift and unlift do not evaluate source functions twice on each invocation
    • runWith allows efficient imperative-style combining of partial functions with conditionally applied actions

    For non-literal partial function classes with nontrivial isDefinedAt method it is recommended to override applyOrElse with custom implementation that avoids double isDefinedAt evaluation. This may result in better performance and more predictable behavior w.r.t. side effects.

    x

    the function argument

    default

    the fallback function

    returns

    the result of this function or fallback function application.

    Definition Classes
    MapLike → PartialFunction
    Since

    2.10

  29. final def asInstanceOf[T0]: T0

    Cast the receiver object to be of type T0.

    Cast the receiver object to be of type T0.

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

    returns

    the receiver object.

    Definition Classes
    Any
    Exceptions thrown

    ClassCastException if the receiver object is not an instance of the erasure of type T0.

  30. def canEqual(that: Any): Boolean

    Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.

    Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.

    that

    The object with which this iterable collection should be compared

    returns

    true, if this iterable collection can possibly equal that, false otherwise. The test takes into consideration only the run-time types of objects but ignores their elements.

    Definition Classes
    IterableLike → Equals
  31. def clear(): Unit

    Removes all bindings from the map.

    Removes all bindings from the map. After this operation has completed, the map will be empty.

    Definition Classes
    MapLike → Builder → Growable → Clearable
  32. def clone(): Map[String, String]

    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

    Definition Classes
    MapLike → Cloneable → AnyRef
    Note

    not specified by SLS as a member of AnyRef

  33. def collect[B](pf: PartialFunction[A, B]): Map[B]

    [use case] Builds a new collection by applying a partial function to all elements of this mutable map

    [use case]

    Builds a new collection by applying a partial function to all elements of this mutable map

    on which the function is defined.

    B

    the element type of the returned collection.

    pf

    the partial function which filters and maps the mutable map .

    returns

    a new mutable map resulting from applying the given partial function pf to each element on which it is defined and collecting the results. The order of the elements is preserved.

    Definition Classes
    TraversableLike → GenTraversableLike
    Full Signature

    def collect[B, That](pf: PartialFunction[(String, String), B])(implicit bf: CanBuildFrom[Map[String, String], B, That]): That

  34. def collectFirst[B](pf: PartialFunction[(String, String), B]): Option[B]

    Finds the first element of the traversable or iterator for which the given partial function is defined, and applies the partial function to it.

    Finds the first element of the traversable or iterator for which the given partial function is defined, and applies the partial function to it.

    Note: may not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    pf

    the partial function

    returns

    an option value containing pf applied to the first value for which it is defined, or None if none exists.

    Definition Classes
    TraversableOnce
    Example:

    1. Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)

  35. def companion: GenericCompanion[collection.mutable.Iterable]

    The factory companion object that builds instances of class Iterable.

    The factory companion object that builds instances of class Iterable. (or its Iterable superclass where class Iterable is not a Seq.)

    Definition Classes
    Iterable → Iterable → GenIterable → Traversable → Traversable → GenTraversable → GenericTraversableTemplate
  36. def compose[A](g: (A) ⇒ String): (A) ⇒ String

    Composes two instances of Function1 in a new Function1, with this function applied last.

    Composes two instances of Function1 in a new Function1, with this function applied last.

    A

    the type to which function g can be applied

    g

    a function A => T1

    returns

    a new function f such that f(x) == apply(g(x))

    Definition Classes
    Function1
    Annotations
    @unspecialized()
  37. def contains(key: String): Boolean

    Tests whether this map contains a binding for a key.

    Tests whether this map contains a binding for a key.

    key

    the key

    returns

    true if there is a binding for key in this map, false otherwise.

    Definition Classes
    SystemProperties → MapLike → GenMapLike
  38. def copyToArray(xs: Array[A], start: Int, len: Int): Unit

    [use case] Copies the elements of this mutable map to an array.

    [use case]

    Copies the elements of this mutable map to an array. Fills the given array xs with at most len elements of this mutable map , starting at position start. Copying will stop once either the end of the current mutable map is reached, or the end of the target array is reached, or len elements have been copied.

    xs

    the array to fill.

    start

    the starting index.

    len

    the maximal number of elements to copy.

    Definition Classes
    IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
    Full Signature

    def copyToArray[B >: (String, String)](xs: Array[B], start: Int, len: Int): Unit

  39. def copyToArray(xs: Array[A]): Unit

    [use case] Copies the elements of this mutable map to an array.

    [use case]

    Copies the elements of this mutable map to an array. Fills the given array xs with values of this mutable map . Copying will stop once either the end of the current mutable map is reached, or the end of the target array is reached.

    xs

    the array to fill.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def copyToArray[B >: (String, String)](xs: Array[B]): Unit

  40. def copyToArray(xs: Array[A], start: Int): Unit

    [use case] Copies the elements of this mutable map to an array.

    [use case]

    Copies the elements of this mutable map to an array. Fills the given array xs with values of this mutable map , beginning at index start. Copying will stop once either the end of the current mutable map is reached, or the end of the target array is reached.

    xs

    the array to fill.

    start

    the starting index.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def copyToArray[B >: (String, String)](xs: Array[B], start: Int): Unit

  41. def copyToBuffer[B >: (String, String)](dest: Buffer[B]): Unit

    Copies all elements of this traversable or iterator to a buffer.

    Copies all elements of this traversable or iterator to a buffer.

    Note: will not terminate for infinite-sized collections.

    dest

    The buffer to which elements are copied.

    Definition Classes
    TraversableOnce
  42. def count(p: ((String, String)) ⇒ Boolean): Int

    Counts the number of elements in the traversable or iterator which satisfy a predicate.

    Counts the number of elements in the traversable or iterator which satisfy a predicate.

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  43. def default(key: String): String

    Defines the default value computation for the map, returned when a key is not found The method implemented here throws an exception, but it might be overridden in subclasses.

    Defines the default value computation for the map, returned when a key is not found The method implemented here throws an exception, but it might be overridden in subclasses.

    key

    the given key value for which a binding is missing.

    Definition Classes
    SystemProperties → MapLike → GenMapLike
    Exceptions thrown
  44. def drop(n: Int): Map[String, String]

    Selects all elements except first n ones.

    Selects all elements except first n ones.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

    the number of elements to drop from this iterable collection.

    returns

    a iterable collection consisting of all elements of this iterable collection except the first n ones, or else the empty iterable collection, if this iterable collection has less than n elements. If n is negative, don't drop any elements.

    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  45. def dropRight(n: Int): Map[String, String]

    Selects all elements except last n ones.

    Selects all elements except last n ones.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

    The number of elements to take

    returns

    a iterable collection consisting of all elements of this iterable collection except the last n ones, or else the empty iterable collection, if this iterable collection has less than n elements.

    Definition Classes
    IterableLike
  46. def dropWhile(p: ((String, String)) ⇒ Boolean): Map[String, String]

    Drops longest prefix of elements that satisfy a predicate.

    Drops longest prefix of elements that satisfy a predicate.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    the longest suffix of this traversable collection whose first element does not satisfy the predicate p.

    Definition Classes
    TraversableLike → GenTraversableLike
  47. def empty: Map[String, String]

    The empty map of the same type as this map

    The empty map of the same type as this map

    returns

    an empty map of type This.

    Definition Classes
    SystemProperties → Map → Map → MapLike
  48. def ensuring(cond: (SystemProperties) ⇒ Boolean, msg: ⇒ Any): SystemProperties
    Implicit
    This member is added by an implicit conversion from SystemProperties to Ensuring[SystemProperties] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  49. def ensuring(cond: (SystemProperties) ⇒ Boolean): SystemProperties
    Implicit
    This member is added by an implicit conversion from SystemProperties to Ensuring[SystemProperties] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  50. def ensuring(cond: Boolean, msg: ⇒ Any): SystemProperties
    Implicit
    This member is added by an implicit conversion from SystemProperties to Ensuring[SystemProperties] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  51. def ensuring(cond: Boolean): SystemProperties
    Implicit
    This member is added by an implicit conversion from SystemProperties to Ensuring[SystemProperties] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  52. final def eq(arg0: AnyRef): Boolean

    Tests whether the argument (that) is a reference to the receiver object (this).

    Tests whether the argument (that) is a reference to the receiver object (this).

    The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:

    • It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.
    • For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
    • null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  53. def equals(that: Any): Boolean

    Compares two maps structurally; i.e., checks if all mappings contained in this map are also contained in the other map, and vice versa.

    Compares two maps structurally; i.e., checks if all mappings contained in this map are also contained in the other map, and vice versa.

    that

    the other map

    returns

    true if both maps contain exactly the same mappings, false otherwise.

    Definition Classes
    GenMapLike → Equals → AnyRef → Any
  54. def exclusively[T](body: ⇒ T): T

    An unenforceable, advisory only place to do some synchronization when mutating system properties.

    An unenforceable, advisory only place to do some synchronization when mutating system properties.

    Implicit
    This member is added by an implicit conversion from SystemProperties to SystemProperties.type performed by method systemPropertiesToCompanion in scala.sys.SystemProperties.
    Definition Classes
    SystemProperties
  55. def exists(p: ((String, String)) ⇒ Boolean): Boolean

    Tests whether a predicate holds for at least one element of this iterable collection.

    Tests whether a predicate holds for at least one element of this iterable collection.

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

    false if this iterable collection is empty, otherwise true if the given predicate p holds for some of the elements of this iterable collection, otherwise false

    Definition Classes
    IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
  56. def filter(p: ((String, String)) ⇒ Boolean): Map[String, String]

    Selects all elements of this traversable collection which satisfy a predicate.

    Selects all elements of this traversable collection which satisfy a predicate.

    p

    the predicate used to test elements.

    returns

    a new traversable collection consisting of all elements of this traversable collection that satisfy the given predicate p. The order of the elements is preserved.

    Definition Classes
    TraversableLike → GenTraversableLike
  57. def filterKeys(p: (String) ⇒ Boolean): Map[String, String]

    Filters this map by retaining only keys satisfying a predicate.

    Filters this map by retaining only keys satisfying a predicate.

    Note: the predicate must accept any key of type K, not just those already present in the map, as the predicate is tested before the underlying map is queried.

    p

    the predicate used to test keys

    returns

    an immutable map consisting only of those key value pairs of this map where the key satisfies the predicate p. The resulting map wraps the original map without copying any elements.

    Definition Classes
    MapLike → GenMapLike
  58. def filterNot(p: ((String, String)) ⇒ Boolean): Map[String, String]

    Returns a new map obtained by removing all key/value pairs for which the predicate p returns true.

    Returns a new map obtained by removing all key/value pairs for which the predicate p returns true.

    Note: This method works by successively removing elements for which the predicate is true from this set. If removal is slow, or you expect that most elements of the set will be removed, you might consider using filter with a negated predicate instead.

    p

    A predicate over key-value pairs

    returns

    A new map containing elements not satisfying the predicate.

    Definition Classes
    MapLike → TraversableLike → GenTraversableLike
  59. def finalize(): Unit

    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
    Note

    not specified by SLS as a member of AnyRef

  60. def find(p: ((String, String)) ⇒ Boolean): Option[(String, String)]

    Finds the first element of the iterable collection satisfying a predicate, if any.

    Finds the first element of the iterable collection satisfying a predicate, if any.

    Note: may not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    p

    the predicate used to test elements.

    returns

    an option value containing the first element in the iterable collection that satisfies p, or None if none exists.

    Definition Classes
    IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
  61. def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): Map[B]

    [use case] Builds a new collection by applying a function to all elements of this mutable map

    [use case]

    Builds a new collection by applying a function to all elements of this mutable map

    and using the elements of the resulting collections.

    For example:

    def getWords(lines: Seq[String]): Seq[String] = lines flatMap (line => line split "\\W+")

    The type of the resulting collection is guided by the static type of mutable map . This might cause unexpected results sometimes. For example:

    // lettersOf will return a Seq[Char] of likely repeated letters, instead of a Set
def lettersOf(words: Seq[String]) = words flatMap (word => word.toSet)

// lettersOf will return a Set[Char], not a Seq
def lettersOf(words: Seq[String]) = words.toSet flatMap (word => word.toSeq)

// xs will be an Iterable[Int]
val xs = Map("a" -> List(11,111), "b" -> List(22,222)).flatMap(_._2)

// ys will be a Map[Int, Int]
val ys = Map("a" -> List(1 -> 11,1 -> 111), "b" -> List(2 -> 22,2 -> 222)).flatMap(_._2)
    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new mutable map resulting from applying the given collection-valued function f to each element of this mutable map and concatenating the results.

    Definition Classes
    TraversableLike → GenTraversableLike → FilterMonadic
    Full Signature

    def flatMap[B, That](f: ((String, String)) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[Map[String, String], B, That]): That

  62. def flatten[B]: Map[B]

    [use case] Converts this mutable map of traversable collections into a mutable map formed by the elements of these traversable collections.

    [use case]

    Converts this mutable map of traversable collections into a mutable map formed by the elements of these traversable collections.

    The resulting collection's type will be guided by the static type of mutable map . For example:

    val xs = List(
           Set(1, 2, 3),
           Set(1, 2, 3)
         ).flatten
// xs == List(1, 2, 3, 1, 2, 3)

val ys = Set(
           List(1, 2, 3),
           List(3, 2, 1)
         ).flatten
// ys == Set(1, 2, 3)
    B

    the type of the elements of each traversable collection.

    returns

    a new mutable map resulting from concatenating all element mutable map s.

    Definition Classes
    GenericTraversableTemplate
    Full Signature

    def flatten[B](implicit asTraversable: ((String, String)) ⇒ GenTraversableOnce[B]): collection.mutable.Iterable[B]

  63. def fold[A1 >: (String, String)](z: A1)(op: (A1, A1) ⇒ A1): A1

    Folds the elements of this traversable or iterator using the specified associative binary operator.

    Folds the elements of this traversable or iterator using the specified associative binary operator.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    Note: will not terminate for infinite-sized collections.

    A1

    a type parameter for the binary operator, a supertype of A.

    z

    a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change the result (e.g., Nil for list concatenation, 0 for addition, or 1 for multiplication).

    op

    a binary operator that must be associative.

    returns

    the result of applying the fold operator op between all the elements and z, or z if this traversable or iterator is empty.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  64. def foldLeft[B](z: B)(op: (B, (String, String)) ⇒ B): B

    Applies a binary operator to a start value and all elements of this traversable or iterator, going left to right.

    Applies a binary operator to a start value and all elements of this traversable or iterator, going left to right.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

    B

    the result type of the binary operator.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this traversable or iterator, going left to right with the start value z on the left:

    op(...op(z, x_1), x_2, ..., x_n)

    where x1, ..., xn are the elements of this traversable or iterator. Returns z if this traversable or iterator is empty.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  65. def foldRight[B](z: B)(op: ((String, String), B) ⇒ B): B

    Applies a binary operator to all elements of this iterable collection and a start value, going right to left.

    Applies a binary operator to all elements of this iterable collection and a start value, going right to left.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    B

    the result type of the binary operator.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this iterable collection, going right to left with the start value z on the right:

    op(x_1, op(x_2, ... op(x_n, z)...))

    where x1, ..., xn are the elements of this iterable collection. Returns z if this iterable collection is empty.

    Definition Classes
    IterableLike → TraversableOnce → GenTraversableOnce
  66. def forall(p: ((String, String)) ⇒ Boolean): Boolean

    Tests whether a predicate holds for all elements of this iterable collection.

    Tests whether a predicate holds for all elements of this iterable collection.

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

    true if this iterable collection is empty or the given predicate p holds for all elements of this iterable collection, otherwise false.

    Definition Classes
    IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
  67. def foreach(f: ((String, String)) ⇒ Unit): Unit

    [use case] Applies a function f to all elements of this mutable map .

    [use case]

    Applies a function f to all elements of this mutable map .

    Note: this method underlies the implementation of most other bulk operations. Subclasses should re-implement this method if a more efficient implementation exists.

    f

    the function that is applied for its side-effect to every element. The result of function f is discarded.

    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike → TraversableOnce → GenTraversableOnce → FilterMonadic
    Full Signature

    def foreach[U](f: ((String, String)) ⇒ U): Unit

  68. def formatted(fmtstr: String): String

    Returns string formatted according to given format string.

    Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).

    Implicit
    This member is added by an implicit conversion from SystemProperties to StringFormat[SystemProperties] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  69. def genericBuilder[B]: Builder[B, collection.mutable.Iterable[B]]

    The generic builder that builds instances of Traversable at arbitrary element types.

    The generic builder that builds instances of Traversable at arbitrary element types.

    Definition Classes
    GenericTraversableTemplate
  70. def get(key: String): Option[String]

    Optionally returns the value associated with a key.

    Optionally returns the value associated with a key.

    key

    the key value

    returns

    an option value containing the value associated with key in this map, or None if none exists.

    Definition Classes
    SystemProperties → MapLike → GenMapLike
  71. final def getClass(): Class[_]

    Returns the runtime class representation of the object.

    Returns the runtime class representation of the object.

    returns

    a class object corresponding to the runtime type of the receiver.

    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  72. def getOrElse(key: String, default: ⇒ String): String

    [use case] Returns the value associated with a key, or a default value if the key is not contained in the map.

    [use case]

    Returns the value associated with a key, or a default value if the key is not contained in the map.

    key

    the key.

    default

    a computation that yields a default value in case no binding for key is found in the map.

    returns

    the value associated with key if it exists, otherwise the result of the default computation.

    Definition Classes
    MapLike → GenMapLike
    Full Signature

    def getOrElse[V1 >: String](key: String, default: ⇒ V1): V1

  73. def getOrElseUpdate(key: String, op: ⇒ String): String

    If given key is already in this map, returns associated value.

    If given key is already in this map, returns associated value.

    Otherwise, computes value from given expression op, stores with key in map and returns that value.

    Concurrent map implementations may evaluate the expression op multiple times, or may evaluate op without inserting the result.

    key

    the key to test

    op

    the computation yielding the value to associate with key, if key is previously unbound.

    returns

    the value associated with key (either previously or as a result of executing the method).

    Definition Classes
    MapLike
  74. def groupBy[K](f: ((String, String)) ⇒ K): Map[K, Map[String, String]]

    Partitions this traversable collection into a map of traversable collections according to some discriminator function.

    Partitions this traversable collection into a map of traversable collections according to some discriminator function.

    Note: this method is not re-implemented by views. This means when applied to a view it will always force the view and return a new traversable collection.

    K

    the type of keys returned by the discriminator function.

    f

    the discriminator function.

    returns

    A map from keys to traversable collections such that the following invariant holds:

    (xs groupBy f)(k) = xs filter (x => f(x) == k)

    That is, every key k is bound to a traversable collection of those elements x for which f(x) equals k.

    Definition Classes
    TraversableLike → GenTraversableLike
  75. def grouped(size: Int): collection.Iterator[Map[String, String]]

    Partitions elements in fixed size iterable collections.

    Partitions elements in fixed size iterable collections.

    size

    the number of elements per group

    returns

    An iterator producing iterable collections of size size, except the last will be less than size size if the elements don't divide evenly.

    Definition Classes
    IterableLike
    See also

    scala.collection.Iterator, method grouped

  76. def hasDefiniteSize: Boolean

    Tests whether this traversable collection is known to have a finite size.

    Tests whether this traversable collection is known to have a finite size. All strict collections are known to have finite size. For a non-strict collection such as Stream, the predicate returns true if all elements have been computed. It returns false if the stream is not yet evaluated to the end. Non-empty Iterators usually return false even if they were created from a collection with a known finite size.

    Note: many collection methods will not work on collections of infinite sizes. The typical failure mode is an infinite loop. These methods always attempt a traversal without checking first that hasDefiniteSize returns true. However, checking hasDefiniteSize can provide an assurance that size is well-defined and non-termination is not a concern.

    returns

    true if this collection is known to have finite size, false otherwise.

    Definition Classes
    TraversableLike → TraversableOnce → GenTraversableOnce
  77. def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

    the hash code value for this object.

    Definition Classes
    GenMapLike → AnyRef → Any
  78. def head: (String, String)

    Selects the first element of this iterable collection.

    Selects the first element of this iterable collection.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    the first element of this iterable collection.

    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
    Exceptions thrown

    NoSuchElementException if the iterable collection is empty.

  79. def headOption: Option[(String, String)]

    Optionally selects the first element.

    Optionally selects the first element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    the first element of this traversable collection if it is nonempty, None if it is empty.

    Definition Classes
    TraversableLike → GenTraversableLike
  80. lazy val headless: BooleanProp
    Implicit
    This member is added by an implicit conversion from SystemProperties to SystemProperties.type performed by method systemPropertiesToCompanion in scala.sys.SystemProperties.
    Definition Classes
    SystemProperties
  81. def help(key: String): String
    Implicit
    This member is added by an implicit conversion from SystemProperties to SystemProperties.type performed by method systemPropertiesToCompanion in scala.sys.SystemProperties.
    Definition Classes
    SystemProperties
  82. def init: Map[String, String]

    Selects all elements except the last.

    Selects all elements except the last.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    a traversable collection consisting of all elements of this traversable collection except the last one.

    Definition Classes
    TraversableLike → GenTraversableLike
    Exceptions thrown

    UnsupportedOperationException if the traversable collection is empty.

  83. def inits: collection.Iterator[Map[String, String]]

    Iterates over the inits of this traversable collection.

    Iterates over the inits of this traversable collection. The first value will be this traversable collection and the final one will be an empty traversable collection, with the intervening values the results of successive applications of init.

    returns

    an iterator over all the inits of this traversable collection

    Definition Classes
    TraversableLike
    Example:

    1. List(1,2,3).inits = Iterator(List(1,2,3), List(1,2), List(1), Nil)

  84. def isDefinedAt(key: String): Boolean

    Tests whether this map contains a binding for a key.

    Tests whether this map contains a binding for a key. This method, which implements an abstract method of trait PartialFunction, is equivalent to contains.

    key

    the key

    returns

    true if there is a binding for key in this map, false otherwise.

    Definition Classes
    MapLike → GenMapLike → PartialFunction
  85. def isEmpty: Boolean

    Tests whether the map is empty.

    Tests whether the map is empty.

    returns

    true if the map does not contain any key/value binding, false otherwise.

    Definition Classes
    MapLike → IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
  86. final def isInstanceOf[T0]: Boolean

    Test whether the dynamic type of the receiver object is T0.

    Test whether the dynamic type of the receiver object is T0.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    Definition Classes
    Any
  87. final def isTraversableAgain: Boolean

    Tests whether this traversable collection can be repeatedly traversed.

    Tests whether this traversable collection can be repeatedly traversed.

    returns

    true

    Definition Classes
    TraversableLike → GenTraversableLike → GenTraversableOnce
  88. def iterator: collection.Iterator[(String, String)]

    Creates a new iterator over all key/value pairs of this map

    Creates a new iterator over all key/value pairs of this map

    returns

    the new iterator

    Definition Classes
    SystemProperties → MapLike → IterableLike → GenIterableLike
  89. def keySet: Set[String]

    Collects all keys of this map in a set.

    Collects all keys of this map in a set.

    returns

    a set containing all keys of this map.

    Definition Classes
    MapLike → GenMapLike
  90. def keys: collection.Iterable[String]

    Collects all keys of this map in an iterable collection.

    Collects all keys of this map in an iterable collection.

    returns

    the keys of this map as an iterable.

    Definition Classes
    MapLike → GenMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) keys returns Iterable[K] rather than Iterator[K].

  91. def keysIterator: collection.Iterator[String]

    Creates an iterator for all keys.

    Creates an iterator for all keys.

    returns

    an iterator over all keys.

    Definition Classes
    MapLike → GenMapLike
  92. def last: (String, String)

    Selects the last element.

    Selects the last element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    The last element of this traversable collection.

    Definition Classes
    TraversableLike → GenTraversableLike
    Exceptions thrown

    NoSuchElementException If the traversable collection is empty.

  93. def lastOption: Option[(String, String)]

    Optionally selects the last element.

    Optionally selects the last element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    the last element of this traversable collection$ if it is nonempty, None if it is empty.

    Definition Classes
    TraversableLike → GenTraversableLike
  94. def lift: (String) ⇒ Option[String]

    Turns this partial function into a plain function returning an Option result.

    Turns this partial function into a plain function returning an Option result.

    returns

    a function that takes an argument x to Some(this(x)) if this is defined for x, and to None otherwise.

    Definition Classes
    PartialFunction
    See also

    Function.unlift

  95. def map[B](f: (A) ⇒ B): Map[B]

    [use case] Builds a new collection by applying a function to all elements of this mutable map .

    [use case]

    Builds a new collection by applying a function to all elements of this mutable map .

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new mutable map resulting from applying the given function f to each element of this mutable map and collecting the results.

    Definition Classes
    TraversableLike → GenTraversableLike → FilterMonadic
    Full Signature

    def map[B, That](f: ((String, String)) ⇒ B)(implicit bf: CanBuildFrom[Map[String, String], B, That]): That

  96. def mapResult[NewTo](f: (Map[String, String]) ⇒ NewTo): Builder[(String, String), NewTo]

    Creates a new builder by applying a transformation function to the results of this builder.

    Creates a new builder by applying a transformation function to the results of this builder.

    NewTo

    the type of collection returned by f.

    f

    the transformation function.

    returns

    a new builder which is the same as the current builder except that a transformation function is applied to this builder's result.

    Definition Classes
    Builder
    Note

    The original builder should no longer be used after mapResult is called.

  97. def mapValues[W](f: (String) ⇒ W): Map[String, W]

    Transforms this map by applying a function to every retrieved value.

    Transforms this map by applying a function to every retrieved value.

    f

    the function used to transform values of this map.

    returns

    a map view which maps every key of this map to f(this(key)). The resulting map wraps the original map without copying any elements.

    Definition Classes
    MapLike → GenMapLike
  98. def max: A

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

    the largest element of this mutable map .

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def max[B >: (String, String)](implicit cmp: Ordering[B]): (String, String)

    Exceptions thrown

    UnsupportedOperationException if this mutable map is empty.

  99. def maxBy[B](f: (A) ⇒ B): A

    [use case] Finds the first element which yields the largest value measured by function f.

    [use case]

    Finds the first element which yields the largest value measured by function f.

    B

    The result type of the function f.

    f

    The measuring function.

    returns

    the first element of this mutable map with the largest value measured by function f.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def maxBy[B](f: ((String, String)) ⇒ B)(implicit cmp: Ordering[B]): (String, String)

    Exceptions thrown

    UnsupportedOperationException if this mutable map is empty.

  100. def min: A

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

    the smallest element of this mutable map

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def min[B >: (String, String)](implicit cmp: Ordering[B]): (String, String)

    Exceptions thrown

    UnsupportedOperationException if this mutable map is empty.

  101. def minBy[B](f: (A) ⇒ B): A

    [use case] Finds the first element which yields the smallest value measured by function f.

    [use case]

    Finds the first element which yields the smallest value measured by function f.

    B

    The result type of the function f.

    f

    The measuring function.

    returns

    the first element of this mutable map with the smallest value measured by function f.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def minBy[B](f: ((String, String)) ⇒ B)(implicit cmp: Ordering[B]): (String, String)

    Exceptions thrown

    UnsupportedOperationException if this mutable map is empty.

  102. def mkString: String

    Displays all elements of this traversable or iterator in a string.

    Displays all elements of this traversable or iterator in a string.

    returns

    a string representation of this traversable or iterator. In the resulting string the string representations (w.r.t. the method toString) of all elements of this traversable or iterator follow each other without any separator string.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  103. def mkString(sep: String): String

    Displays all elements of this traversable or iterator in a string using a separator string.

    Displays all elements of this traversable or iterator in a string using a separator string.

    sep

    the separator string.

    returns

    a string representation of this traversable or iterator. In the resulting string the string representations (w.r.t. the method toString) of all elements of this traversable or iterator are separated by the string sep.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Example:

    1. List(1, 2, 3).mkString("|") = "1|2|3"

  104. def mkString(start: String, sep: String, end: String): String

    Displays all elements of this traversable or iterator in a string using start, end, and separator strings.

    Displays all elements of this traversable or iterator in a string using start, end, and separator strings.

    start

    the starting string.

    sep

    the separator string.

    end

    the ending string.

    returns

    a string representation of this traversable or iterator. The resulting string begins with the string start and ends with the string end. Inside, the string representations (w.r.t. the method toString) of all elements of this traversable or iterator are separated by the string sep.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Example:

    1. List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"

  105. def names: collection.Iterator[String]
  106. final def ne(arg0: AnyRef): Boolean

    Equivalent to !(this eq that).

    Equivalent to !(this eq that).

    returns

    true if the argument is not a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  107. def newBuilder: Builder[(String, String), Map[String, String]]

    A common implementation of newBuilder for all mutable maps in terms of empty.

    A common implementation of newBuilder for all mutable maps in terms of empty.

    Overrides MapLike implementation for better efficiency.

    Attributes
    protected[this]
    Definition Classes
    MapLike → MapLike → TraversableLike → HasNewBuilder
  108. lazy val noTraceSuppression: BooleanProp
    Implicit
    This member is added by an implicit conversion from SystemProperties to SystemProperties.type performed by method systemPropertiesToCompanion in scala.sys.SystemProperties.
    Definition Classes
    SystemProperties
  109. def nonEmpty: Boolean

    Tests whether the traversable or iterator is not empty.

    Tests whether the traversable or iterator is not empty.

    returns

    true if the traversable or iterator contains at least one element, false otherwise.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  110. final def notify(): Unit

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Annotations
    @native()
    Note

    not specified by SLS as a member of AnyRef

  111. final def notifyAll(): Unit

    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Annotations
    @native()
    Note

    not specified by SLS as a member of AnyRef

  112. def orElse[A1 <: String, B1 >: String](that: PartialFunction[A1, B1]): PartialFunction[A1, B1]

    Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

    Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

    A1

    the argument type of the fallback function

    B1

    the result type of the fallback function

    that

    the fallback function

    returns

    a partial function which has as domain the union of the domains of this partial function and that. The resulting partial function takes x to this(x) where this is defined, and to that(x) where it is not.

    Definition Classes
    PartialFunction
  113. def par: ParMap[String, String]

    Returns a parallel implementation of this collection.

    Returns a parallel implementation of this collection.

    For most collection types, this method creates a new parallel collection by copying all the elements. For these collection, par takes linear time. Mutable collections in this category do not produce a mutable parallel collection that has the same underlying dataset, so changes in one collection will not be reflected in the other one.

    Specific collections (e.g. ParArray or mutable.ParHashMap) override this default behaviour by creating a parallel collection which shares the same underlying dataset. For these collections, par takes constant or sublinear time.

    All parallel collections return a reference to themselves.

    returns

    a parallel implementation of this collection

    Definition Classes
    Parallelizable
  114. def parCombiner: Combiner[(String, String), ParMap[String, String]]

    The default par implementation uses the combiner provided by this method to create a new parallel collection.

    The default par implementation uses the combiner provided by this method to create a new parallel collection.

    returns

    a combiner for the parallel collection of type ParRepr

    Attributes
    protected[this]
    Definition Classes
    MapLike → MapLike → TraversableLike → Parallelizable
  115. def partition(p: ((String, String)) ⇒ Boolean): (Map[String, String], Map[String, String])

    Partitions this traversable collection in two traversable collections according to a predicate.

    Partitions this traversable collection in two traversable collections according to a predicate.

    p

    the predicate on which to partition.

    returns

    a pair of traversable collections: the first traversable collection consists of all elements that satisfy the predicate p and the second traversable collection consists of all elements that don't. The relative order of the elements in the resulting traversable collections is the same as in the original traversable collection.

    Definition Classes
    TraversableLike → GenTraversableLike
  116. lazy val preferIPv4Stack: BooleanProp
    Implicit
    This member is added by an implicit conversion from SystemProperties to SystemProperties.type performed by method systemPropertiesToCompanion in scala.sys.SystemProperties.
    Definition Classes
    SystemProperties
  117. lazy val preferIPv6Addresses: BooleanProp
    Implicit
    This member is added by an implicit conversion from SystemProperties to SystemProperties.type performed by method systemPropertiesToCompanion in scala.sys.SystemProperties.
    Definition Classes
    SystemProperties
  118. def product: A

    [use case] Multiplies up the elements of this collection.

    [use case]

    Multiplies up the elements of this collection.

    returns

    the product of all elements in this mutable map of numbers of type Int. Instead of Int, any other type T with an implicit Numeric[T] implementation can be used as element type of the mutable map and as result type of product. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def product[B >: (String, String)](implicit num: Numeric[B]): B

  119. def put(key: String, value: String): Option[String]

    Adds a new key/value pair to this map and optionally returns previously bound value.

    Adds a new key/value pair to this map and optionally returns previously bound value. If the map already contains a mapping for the key, it will be overridden by the new value.

    key

    the key to update

    value

    the new value

    returns

    an option value containing the value associated with the key before the put operation was executed, or None if key was not defined in the map before.

    Definition Classes
    MapLike
  120. def reduce[A1 >: (String, String)](op: (A1, A1) ⇒ A1): A1

    Reduces the elements of this traversable or iterator using the specified associative binary operator.

    Reduces the elements of this traversable or iterator using the specified associative binary operator.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    A1

    A type parameter for the binary operator, a supertype of A.

    op

    A binary operator that must be associative.

    returns

    The result of applying reduce operator op between all the elements if the traversable or iterator is nonempty.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Exceptions thrown

    UnsupportedOperationException if this traversable or iterator is empty.

  121. def reduceLeft[B >: (String, String)](op: (B, (String, String)) ⇒ B): B

    Applies a binary operator to all elements of this traversable or iterator, going left to right.

    Applies a binary operator to all elements of this traversable or iterator, going left to right.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this traversable or iterator, going left to right:

    op( op( ... op(x_1, x_2) ..., x_{n-1}), x_n)

    where x1, ..., xn are the elements of this traversable or iterator.

    Definition Classes
    TraversableOnce
    Exceptions thrown

    UnsupportedOperationException if this traversable or iterator is empty.

  122. def reduceLeftOption[B >: (String, String)](op: (B, (String, String)) ⇒ B): Option[B]

    Optionally applies a binary operator to all elements of this traversable or iterator, going left to right.

    Optionally applies a binary operator to all elements of this traversable or iterator, going left to right.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    an option value containing the result of reduceLeft(op) if this traversable or iterator is nonempty, None otherwise.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  123. def reduceOption[A1 >: (String, String)](op: (A1, A1) ⇒ A1): Option[A1]

    Reduces the elements of this traversable or iterator, if any, using the specified associative binary operator.

    Reduces the elements of this traversable or iterator, if any, using the specified associative binary operator.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    A1

    A type parameter for the binary operator, a supertype of A.

    op

    A binary operator that must be associative.

    returns

    An option value containing result of applying reduce operator op between all the elements if the collection is nonempty, and None otherwise.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  124. def reduceRight[B >: (String, String)](op: ((String, String), B) ⇒ B): B

    Applies a binary operator to all elements of this iterable collection, going right to left.

    Applies a binary operator to all elements of this iterable collection, going right to left.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this iterable collection, going right to left:

    op(x_1, op(x_2, ..., op(x_{n-1}, x_n)...))

    where x1, ..., xn are the elements of this iterable collection.

    Definition Classes
    IterableLike → TraversableOnce → GenTraversableOnce
    Exceptions thrown

    UnsupportedOperationException if this iterable collection is empty.

  125. def reduceRightOption[B >: (String, String)](op: ((String, String), B) ⇒ B): Option[B]

    Optionally applies a binary operator to all elements of this traversable or iterator, going right to left.

    Optionally applies a binary operator to all elements of this traversable or iterator, going right to left.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    an option value containing the result of reduceRight(op) if this traversable or iterator is nonempty, None otherwise.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  126. def remove(key: String): Option[String]

    Removes a key from this map, returning the value associated previously with that key as an option.

    Removes a key from this map, returning the value associated previously with that key as an option.

    key

    the key to be removed

    returns

    an option value containing the value associated previously with key, or None if key was not defined in the map before.

    Definition Classes
    MapLike
  127. def repr: Map[String, String]

    The collection of type traversable collection underlying this TraversableLike object.

    The collection of type traversable collection underlying this TraversableLike object. By default this is implemented as the TraversableLike object itself, but this can be overridden.

    Definition Classes
    TraversableLike → GenTraversableLike
  128. def result(): Map[String, String]

    The result when this map is used as a builder

    The result when this map is used as a builder

    returns

    the map representation itself.

    Definition Classes
    MapLike → Builder
  129. def retain(p: (String, String) ⇒ Boolean): SystemProperties.this.type

    Retains only those mappings for which the predicate p returns true.

    Retains only those mappings for which the predicate p returns true.

    p

    The test predicate

    Definition Classes
    MapLike
  130. def reversed: List[(String, String)]
    Attributes
    protected[this]
    Definition Classes
    TraversableOnce
  131. def runWith[U](action: (String) ⇒ U): (String) ⇒ Boolean

    Composes this partial function with an action function which gets applied to results of this partial function.

    Composes this partial function with an action function which gets applied to results of this partial function. The action function is invoked only for its side effects; its result is ignored.

    Note that expression pf.runWith(action)(x) is equivalent to

    if(pf isDefinedAt x) { action(pf(x)); true } else false

    except that runWith is implemented via applyOrElse and thus potentially more efficient. Using runWith avoids double evaluation of pattern matchers and guards for partial function literals.

    action

    the action function

    returns

    a function which maps arguments x to isDefinedAt(x). The resulting function runs action(this(x)) where this is defined.

    Definition Classes
    PartialFunction
    Since

    2.10

    See also

    applyOrElse.

  132. def sameElements(that: GenIterable[A]): Boolean

    [use case] Checks if the other iterable collection contains the same elements in the same order as this mutable map .

    [use case]

    Checks if the other iterable collection contains the same elements in the same order as this mutable map .

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    that

    the collection to compare with.

    returns

    true, if both collections contain the same elements in the same order, false otherwise.

    Definition Classes
    IterableLike → GenIterableLike
    Full Signature

    def sameElements[B >: (String, String)](that: GenIterable[B]): Boolean

  133. def scan[B >: (String, String), That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[Map[String, String], B, That]): That

    Computes a prefix scan of the elements of the collection.

    Computes a prefix scan of the elements of the collection.

    Note: The neutral element z may be applied more than once.

    B

    element type of the resulting collection

    That

    type of the resulting collection

    z

    neutral element for the operator op

    op

    the associative operator for the scan

    cbf

    combiner factory which provides a combiner

    returns

    a new traversable collection containing the prefix scan of the elements in this traversable collection

    Definition Classes
    TraversableLike → GenTraversableLike
  134. def scanLeft[B, That](z: B)(op: (B, (String, String)) ⇒ B)(implicit bf: CanBuildFrom[Map[String, String], B, That]): That

    Produces a collection containing cumulative results of applying the operator going left to right.

    Produces a collection containing cumulative results of applying the operator going left to right.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    B

    the type of the elements in the resulting collection

    That

    the actual type of the resulting collection

    z

    the initial value

    op

    the binary operator applied to the intermediate result and the element

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    TraversableLike → GenTraversableLike
  135. def scanRight[B, That](z: B)(op: ((String, String), B) ⇒ B)(implicit bf: CanBuildFrom[Map[String, String], B, That]): That

    Produces a collection containing cumulative results of applying the operator going right to left.

    Produces a collection containing cumulative results of applying the operator going right to left. The head of the collection is the last cumulative result.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    Example:

    List(1, 2, 3, 4).scanRight(0)(_ + _) == List(10, 9, 7, 4, 0)
    B

    the type of the elements in the resulting collection

    That

    the actual type of the resulting collection

    z

    the initial value

    op

    the binary operator applied to the intermediate result and the element

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    TraversableLike → GenTraversableLike
    Annotations
    @migration
    Migration

    (Changed in version 2.9.0) The behavior of scanRight has changed. The previous behavior can be reproduced with scanRight.reverse.

  136. def seq: Map[String, String]

    A version of this collection with all of the operations implemented sequentially (i.e., in a single-threaded manner).

    A version of this collection with all of the operations implemented sequentially (i.e., in a single-threaded manner).

    This method returns a reference to this collection. In parallel collections, it is redefined to return a sequential implementation of this collection. In both cases, it has O(1) complexity.

    returns

    a sequential view of the collection.

    Definition Classes
    Map → Map → GenMap → GenMapLike → Iterable → Iterable → GenIterable → Traversable → Traversable → GenTraversable → Parallelizable → TraversableOnce → GenTraversableOnce
  137. def size: Int

    The size of this traversable or iterator.

    The size of this traversable or iterator.

    Note: will not terminate for infinite-sized collections.

    returns

    the number of elements in this traversable or iterator.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  138. def sizeHint(coll: TraversableLike[_, _], delta: Int): Unit

    Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta.

    Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta. This will provide a hint only if the collection is known to have a cheap size method. Currently this is assumed to be the case if and only if the collection is of type IndexedSeqLike. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

    coll

    the collection which serves as a hint for the result's size.

    delta

    a correction to add to the coll.size to produce the size hint.

    Definition Classes
    Builder
  139. def sizeHint(coll: TraversableLike[_, _]): Unit

    Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta.

    Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta. This will provide a hint only if the collection is known to have a cheap size method, which is determined by calling sizeHint.

    Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

    coll

    the collection which serves as a hint for the result's size.

    Definition Classes
    Builder
  140. def sizeHint(size: Int): Unit

    Gives a hint how many elements are expected to be added when the next result is called.

    Gives a hint how many elements are expected to be added when the next result is called. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

    size

    the hint how many elements will be added.

    Definition Classes
    Builder
  141. def sizeHintBounded(size: Int, boundingColl: TraversableLike[_, _]): Unit

    Gives a hint how many elements are expected to be added when the next result is called, together with an upper bound given by the size of some other collection.

    Gives a hint how many elements are expected to be added when the next result is called, together with an upper bound given by the size of some other collection. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

    size

    the hint how many elements will be added.

    boundingColl

    the bounding collection. If it is an IndexedSeqLike, then sizes larger than collection's size are reduced.

    Definition Classes
    Builder
  142. def sizeHintIfCheap: Int

    The size of this collection or iterator, if it can be cheaply computed

    The size of this collection or iterator, if it can be cheaply computed

    returns

    the number of elements in this collection or iterator, or -1 if the size cannot be determined cheaply

    Attributes
    protected[scala.collection]
    Definition Classes
    GenTraversableOnce
  143. def slice(from: Int, until: Int): Map[String, String]

    Selects an interval of elements.

    Selects an interval of elements. The returned collection is made up of all elements x which satisfy the invariant:

    from <= indexOf(x) < until

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    a iterable collection containing the elements greater than or equal to index from extending up to (but not including) index until of this iterable collection.

    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  144. def sliding(size: Int, step: Int): collection.Iterator[Map[String, String]]

    Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

    Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

    size

    the number of elements per group

    step

    the distance between the first elements of successive groups

    returns

    An iterator producing iterable collections of size size, except the last element (which may be the only element) will be truncated if there are fewer than size elements remaining to be grouped.

    Definition Classes
    IterableLike
    See also

    scala.collection.Iterator, method sliding

  145. def sliding(size: Int): collection.Iterator[Map[String, String]]

    Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.) The "sliding window" step is set to one.

    Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.) The "sliding window" step is set to one.

    size

    the number of elements per group

    returns

    An iterator producing iterable collections of size size, except the last element (which may be the only element) will be truncated if there are fewer than size elements remaining to be grouped.

    Definition Classes
    IterableLike
    See also

    scala.collection.Iterator, method sliding

  146. def span(p: ((String, String)) ⇒ Boolean): (Map[String, String], Map[String, String])

    Splits this traversable collection into a prefix/suffix pair according to a predicate.

    Splits this traversable collection into a prefix/suffix pair according to a predicate.

    Note: c span p is equivalent to (but possibly more efficient than) (c takeWhile p, c dropWhile p), provided the evaluation of the predicate p does not cause any side-effects.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    a pair consisting of the longest prefix of this traversable collection whose elements all satisfy p, and the rest of this traversable collection.

    Definition Classes
    TraversableLike → GenTraversableLike
  147. def splitAt(n: Int): (Map[String, String], Map[String, String])

    Splits this traversable collection into two at a given position.

    Splits this traversable collection into two at a given position. Note: c splitAt n is equivalent to (but possibly more efficient than) (c take n, c drop n).

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

    the position at which to split.

    returns

    a pair of traversable collections consisting of the first n elements of this traversable collection, and the other elements.

    Definition Classes
    TraversableLike → GenTraversableLike
  148. def stringPrefix: String

    Defines the prefix of this object's toString representation.

    Defines the prefix of this object's toString representation.

    returns

    a string representation which starts the result of toString applied to this map. Unless overridden in subclasses, the string prefix of every map is "Map".

    Definition Classes
    MapLike → TraversableLike → GenTraversableLike
  149. def sum: A

    [use case] Sums up the elements of this collection.

    [use case]

    Sums up the elements of this collection.

    returns

    the sum of all elements in this mutable map of numbers of type Int. Instead of Int, any other type T with an implicit Numeric[T] implementation can be used as element type of the mutable map and as result type of sum. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def sum[B >: (String, String)](implicit num: Numeric[B]): B

  150. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  151. implicit def systemPropertiesToCompanion(p: SystemProperties): SystemProperties.type
    Implicit
    This member is added by an implicit conversion from SystemProperties to SystemProperties.type performed by method systemPropertiesToCompanion in scala.sys.SystemProperties.
    Definition Classes
    SystemProperties
  152. def tail: Map[String, String]

    Selects all elements except the first.

    Selects all elements except the first.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    a traversable collection consisting of all elements of this traversable collection except the first one.

    Definition Classes
    TraversableLike → GenTraversableLike
    Exceptions thrown

    java.lang.UnsupportedOperationException if the traversable collection is empty.

  153. def tails: collection.Iterator[Map[String, String]]

    Iterates over the tails of this traversable collection.

    Iterates over the tails of this traversable collection. The first value will be this traversable collection and the final one will be an empty traversable collection, with the intervening values the results of successive applications of tail.

    returns

    an iterator over all the tails of this traversable collection

    Definition Classes
    TraversableLike
    Example:

    1. List(1,2,3).tails = Iterator(List(1,2,3), List(2,3), List(3), Nil)

  154. def take(n: Int): Map[String, String]

    Selects first n elements.

    Selects first n elements.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

    the number of elements to take from this iterable collection.

    returns

    a iterable collection consisting only of the first n elements of this iterable collection, or else the whole iterable collection, if it has less than n elements. If n is negative, returns an empty iterable collection.

    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  155. def takeRight(n: Int): Map[String, String]

    Selects last n elements.

    Selects last n elements.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

    the number of elements to take

    returns

    a iterable collection consisting only of the last n elements of this iterable collection, or else the whole iterable collection, if it has less than n elements.

    Definition Classes
    IterableLike
  156. def takeWhile(p: ((String, String)) ⇒ Boolean): Map[String, String]

    Takes longest prefix of elements that satisfy a predicate.

    Takes longest prefix of elements that satisfy a predicate.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    the longest prefix of this iterable collection whose elements all satisfy the predicate p.

    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  157. def thisCollection: collection.Iterable[(String, String)]

    The underlying collection seen as an instance of Iterable.

    The underlying collection seen as an instance of Iterable. By default this is implemented as the current collection object itself, but this can be overridden.

    Attributes
    protected[this]
    Definition Classes
    IterableLike → TraversableLike
  158. def to[Col[_]]: Col[A]

    [use case] Converts this mutable map into another by copying all elements.

    [use case]

    Converts this mutable map into another by copying all elements.

    Col

    The collection type to build.

    returns

    a new collection containing all elements of this mutable map .

    Definition Classes
    TraversableLike → TraversableOnce → GenTraversableOnce
    Full Signature

    def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, (String, String), Col[(String, String)]]): Col[(String, String)]

  159. def toArray: Array[A]

    [use case] Converts this mutable map to an array.

    [use case]

    Converts this mutable map to an array.

    returns

    an array containing all elements of this mutable map . An ClassTag must be available for the element type of this mutable map .

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def toArray[B >: (String, String)](implicit arg0: ClassTag[B]): Array[B]

  160. def toBuffer[E >: (String, String)]: Buffer[E]

    Uses the contents of this map to create a new mutable buffer.

    Uses the contents of this map to create a new mutable buffer.

    returns

    a buffer containing all elements of this map.

    Definition Classes
    MapLike → TraversableOnce → GenTraversableOnce
  161. def toCollection(repr: Map[String, String]): collection.Iterable[(String, String)]

    A conversion from collections of type Repr to Iterable objects.

    A conversion from collections of type Repr to Iterable objects. By default this is implemented as just a cast, but this can be overridden.

    Attributes
    protected[this]
    Definition Classes
    IterableLike → TraversableLike
  162. def toIndexedSeq: collection.immutable.IndexedSeq[(String, String)]

    Converts this traversable or iterator to an indexed sequence.

    Converts this traversable or iterator to an indexed sequence.

    Note: will not terminate for infinite-sized collections.

    returns

    an indexed sequence containing all elements of this traversable or iterator.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  163. def toIterable: collection.Iterable[(String, String)]

    Returns this iterable collection as an iterable collection.

    Returns this iterable collection as an iterable collection.

    A new collection will not be built; lazy collections will stay lazy.

    Note: will not terminate for infinite-sized collections.

    returns

    an Iterable containing all elements of this iterable collection.

    Definition Classes
    IterableLike → TraversableOnce → GenTraversableOnce
  164. def toIterator: collection.Iterator[(String, String)]

    Returns an Iterator over the elements in this iterable collection.

    Returns an Iterator over the elements in this iterable collection. Produces the same result as iterator.

    Note: will not terminate for infinite-sized collections.

    returns

    an Iterator containing all elements of this iterable collection.

    Definition Classes
    IterableLike → TraversableLike → GenTraversableOnce
    Annotations
    @deprecatedOverriding( message = ... , since = "2.11.0" )
  165. def toList: List[(String, String)]

    Converts this traversable or iterator to a list.

    Converts this traversable or iterator to a list.

    Note: will not terminate for infinite-sized collections.

    returns

    a list containing all elements of this traversable or iterator.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  166. def toMap[T, U]: Map[T, U]

    [use case] Converts this mutable map to a map.

    [use case]

    Converts this mutable map to a map. This method is unavailable unless the elements are members of Tuple2, each ((T, U)) becoming a key-value pair in the map. Duplicate keys will be overwritten by later keys: if this is an unordered collection, which key is in the resulting map is undefined.

    returns

    a map of type immutable.Map[T, U] containing all key/value pairs of type (T, U) of this mutable map .

    Definition Classes
    TraversableOnce → GenTraversableOnce
    Full Signature

    def toMap[T, U](implicit ev: <:<[(String, String), (T, U)]): Map[T, U]

  167. def toParArray: ParArray[T]
    Implicit
    This member is added by an implicit conversion from SystemProperties to CollectionsHaveToParArray[SystemProperties, T] performed by method CollectionsHaveToParArray in scala.collection.parallel. This conversion will take place only if an implicit value of type (SystemProperties) ⇒ GenTraversableOnce[T] is in scope.
    Definition Classes
    CollectionsHaveToParArray
  168. def toSeq: collection.Seq[(String, String)]

    Converts this mutable map to a sequence.

    Converts this mutable map to a sequence.

    Note: assumes a fast size method. Subclasses should override if this is not true.

    returns

    a sequence containing all elements of this mutable map.

    Definition Classes
    MapLike → MapLike → TraversableOnce → GenTraversableOnce
  169. def toSet[B >: (String, String)]: Set[B]

    Converts this traversable or iterator to a set.

    Converts this traversable or iterator to a set.

    Note: will not terminate for infinite-sized collections.

    returns

    a set containing all elements of this traversable or iterator.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  170. def toStream: collection.immutable.Stream[(String, String)]

    Converts this iterable collection to a stream.

    Converts this iterable collection to a stream.

    returns

    a stream containing all elements of this iterable collection.

    Definition Classes
    IterableLike → TraversableLike → GenTraversableOnce
  171. def toString(): String

    Converts this map to a string.

    Converts this map to a string.

    returns

    a string representation of this collection. By default this string consists of the stringPrefix of this map, followed by all elements separated by commas and enclosed in parentheses.

    Definition Classes
    MapLike → TraversableLike → Function1 → AnyRef → Any
  172. def toTraversable: collection.Traversable[(String, String)]

    Converts this traversable collection to an unspecified Traversable.

    Converts this traversable collection to an unspecified Traversable. Will return the same collection if this instance is already Traversable.

    Note: will not terminate for infinite-sized collections.

    returns

    a Traversable containing all elements of this traversable collection.

    Definition Classes
    TraversableLike → TraversableOnce → GenTraversableOnce
    Annotations
    @deprecatedOverriding( message = ... , since = "2.11.0" )
  173. def toVector: Vector[(String, String)]

    Converts this traversable or iterator to a Vector.

    Converts this traversable or iterator to a Vector.

    Note: will not terminate for infinite-sized collections.

    returns

    a vector containing all elements of this traversable or iterator.

    Definition Classes
    TraversableOnce → GenTraversableOnce
  174. def transform(f: (String, String) ⇒ String): SystemProperties.this.type

    Applies a transformation function to all values contained in this map.

    Applies a transformation function to all values contained in this map. The transformation function produces new values from existing keys associated values.

    f

    the transformation to apply

    returns

    the map itself.

    Definition Classes
    MapLike
  175. def transpose[B](implicit asTraversable: ((String, String)) ⇒ GenTraversableOnce[B]): collection.mutable.Iterable[collection.mutable.Iterable[B]]

    Transposes this collection of traversable collections into a collection of collections.

    Transposes this collection of traversable collections into a collection of collections.

    The resulting collection's type will be guided by the static type of collection. For example:

    val xs = List(
           Set(1, 2, 3),
           Set(4, 5, 6)).transpose
// xs == List(
//         List(1, 4),
//         List(2, 5),
//         List(3, 6))

val ys = Vector(
           List(1, 2, 3),
           List(4, 5, 6)).transpose
// ys == Vector(
//         Vector(1, 4),
//         Vector(2, 5),
//         Vector(3, 6))
    B

    the type of the elements of each traversable collection.

    asTraversable

    an implicit conversion which asserts that the element type of this collection is a Traversable.

    returns

    a two-dimensional collection of collections which has as nth row the nth column of this collection.

    Definition Classes
    GenericTraversableTemplate
    Annotations
    @migration
    Migration

    (Changed in version 2.9.0) transpose throws an IllegalArgumentException if collections are not uniformly sized.

    Exceptions thrown

    IllegalArgumentException if all collections in this collection are not of the same size.

  176. def unzip[A1, A2](implicit asPair: ((String, String)) ⇒ (A1, A2)): (collection.mutable.Iterable[A1], collection.mutable.Iterable[A2])

    Converts this collection of pairs into two collections of the first and second half of each pair.

    Converts this collection of pairs into two collections of the first and second half of each pair.

    val xs = Traversable(
           (1, "one"),
           (2, "two"),
           (3, "three")).unzip
// xs == (Traversable(1, 2, 3),
//        Traversable(one, two, three))
    A1

    the type of the first half of the element pairs

    A2

    the type of the second half of the element pairs

    asPair

    an implicit conversion which asserts that the element type of this collection is a pair.

    returns

    a pair of collections, containing the first, respectively second half of each element pair of this collection.

    Definition Classes
    GenericTraversableTemplate
  177. def unzip3[A1, A2, A3](implicit asTriple: ((String, String)) ⇒ (A1, A2, A3)): (collection.mutable.Iterable[A1], collection.mutable.Iterable[A2], collection.mutable.Iterable[A3])

    Converts this collection of triples into three collections of the first, second, and third element of each triple.

    Converts this collection of triples into three collections of the first, second, and third element of each triple.

    val xs = Traversable(
           (1, "one", '1'),
           (2, "two", '2'),
           (3, "three", '3')).unzip3
// xs == (Traversable(1, 2, 3),
//        Traversable(one, two, three),
//        Traversable(1, 2, 3))
    A1

    the type of the first member of the element triples

    A2

    the type of the second member of the element triples

    A3

    the type of the third member of the element triples

    asTriple

    an implicit conversion which asserts that the element type of this collection is a triple.

    returns

    a triple of collections, containing the first, second, respectively third member of each element triple of this collection.

    Definition Classes
    GenericTraversableTemplate
  178. def update(key: String, value: String): Unit

    Adds a new key/value pair to this map.

    Adds a new key/value pair to this map. If the map already contains a mapping for the key, it will be overridden by the new value.

    key

    The key to update

    value

    The new value

    Definition Classes
    MapLike
  179. def updated[V1 >: String](key: String, value: V1): Map[String, V1]

    Creates a new map consisting of all key/value pairs of the current map plus a new pair of a given key and value.

    Creates a new map consisting of all key/value pairs of the current map plus a new pair of a given key and value.

    V1

    the type of the added value

    key

    The key to add

    value

    The new value

    returns

    A fresh immutable map with the binding from key to value added to this map.

    Definition Classes
    MapLike → MapLike
  180. def values: collection.Iterable[String]

    Collects all values of this map in an iterable collection.

    Collects all values of this map in an iterable collection.

    returns

    the values of this map as an iterable.

    Definition Classes
    MapLike → GenMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) values returns Iterable[V] rather than Iterator[V].

  181. def valuesIterator: collection.Iterator[String]

    Creates an iterator for all values in this map.

    Creates an iterator for all values in this map.

    returns

    an iterator over all values that are associated with some key in this map.

    Definition Classes
    MapLike → GenMapLike
  182. def view(from: Int, until: Int): IterableView[(String, String), Map[String, String]]

    Creates a non-strict view of a slice of this iterable collection.

    Creates a non-strict view of a slice of this iterable collection.

    Note: the difference between view and slice is that view produces a view of the current iterable collection, whereas slice produces a new iterable collection.

    Note: view(from, to) is equivalent to view.slice(from, to)

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    from

    the index of the first element of the view

    until

    the index of the element following the view

    returns

    a non-strict view of a slice of this iterable collection, starting at index from and extending up to (but not including) index until.

    Definition Classes
    IterableLike → TraversableLike
  183. def view: IterableView[(String, String), Map[String, String]]

    Creates a non-strict view of this iterable collection.

    Creates a non-strict view of this iterable collection.

    returns

    a non-strict view of this iterable collection.

    Definition Classes
    IterableLike → TraversableLike
  184. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  185. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  186. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  187. def withDefault(d: (String) ⇒ String): Map[String, String]

    The same map with a given default function.

    The same map with a given default function.

    Invoking transformer methods (e.g. map) will not preserve the default value.

    d

    the function mapping keys to values, used for non-present keys

    returns

    a wrapper of the map with a default value

    Definition Classes
    Map
  188. def withDefaultValue(d: String): Map[String, String]

    The same map with a given default value.

    The same map with a given default value.

    Invoking transformer methods (e.g. map) will not preserve the default value.

    d

    default value used for non-present keys

    returns

    a wrapper of the map with a default value

    Definition Classes
    Map
  189. def withFilter(p: ((String, String)) ⇒ Boolean): FilterMonadic[(String, String), Map[String, String]]

    Creates a non-strict filter of this traversable collection.

    Creates a non-strict filter of this traversable collection.

    Note: the difference between c filter p and c withFilter p is that the former creates a new collection, whereas the latter only restricts the domain of subsequent map, flatMap, foreach, and withFilter operations.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    p

    the predicate used to test elements.

    returns

    an object of class WithFilter, which supports map, flatMap, foreach, and withFilter operations. All these operations apply to those elements of this traversable collection which satisfy the predicate p.

    Definition Classes
    TraversableLike → FilterMonadic
  190. def wrapAccess[T](body: ⇒ T): Option[T]
  191. def zip[B](that: GenIterable[B]): Map[(A, B)]

    [use case] Returns a mutable map formed from this mutable map and another iterable collection by combining corresponding elements in pairs.

    [use case]

    Returns a mutable map formed from this mutable map and another iterable collection by combining corresponding elements in pairs. If one of the two collections is longer than the other, its remaining elements are ignored.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    B

    the type of the second half of the returned pairs

    that

    The iterable providing the second half of each result pair

    returns

    a new mutable map containing pairs consisting of corresponding elements of this mutable map and that. The length of the returned collection is the minimum of the lengths of this mutable map and that.

    Definition Classes
    IterableLike → GenIterableLike
    Full Signature

    def zip[A1 >: (String, String), B, That](that: GenIterable[B])(implicit bf: CanBuildFrom[Map[String, String], (A1, B), That]): That

  192. def zipAll[B](that: collection.Iterable[B], thisElem: A, thatElem: B): Map[(A, B)]

    [use case] Returns a mutable map formed from this mutable map and another iterable collection by combining corresponding elements in pairs.

    [use case]

    Returns a mutable map formed from this mutable map and another iterable collection by combining corresponding elements in pairs. If one of the two collections is shorter than the other, placeholder elements are used to extend the shorter collection to the length of the longer.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    B

    the type of the second half of the returned pairs

    that

    The iterable providing the second half of each result pair

    thisElem

    the element to be used to fill up the result if this mutable map is shorter than that.

    thatElem

    the element to be used to fill up the result if that is shorter than this mutable map .

    returns

    a new mutable map containing pairs consisting of corresponding elements of this mutable map and that. The length of the returned collection is the maximum of the lengths of this mutable map and that. If this mutable map is shorter than that, thisElem values are used to pad the result. If that is shorter than this mutable map , thatElem values are used to pad the result.

    Definition Classes
    IterableLike → GenIterableLike
    Full Signature

    def zipAll[B, A1 >: (String, String), That](that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[Map[String, String], (A1, B), That]): That

  193. def zipWithIndex: Map[(A, Int)]

    [use case] Zips this mutable map with its indices.

    [use case]

    Zips this mutable map with its indices.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    A new mutable map containing pairs consisting of all elements of this mutable map paired with their index. Indices start at 0.

    Definition Classes
    IterableLike → GenIterableLike
    Full Signature

    def zipWithIndex[A1 >: (String, String), That](implicit bf: CanBuildFrom[Map[String, String], (A1, Int), That]): That

    Example:

    1. List("a", "b", "c").zipWithIndex = List(("a", 0), ("b", 1), ("c", 2))

  194. def →[B](y: B): (SystemProperties, B)
    Implicit
    This member is added by an implicit conversion from SystemProperties to ArrowAssoc[SystemProperties] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Shadowed Implicit Value Members

  1. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from SystemProperties to any2stringadd[SystemProperties] performed by method any2stringadd in scala.Predef.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (systemProperties: any2stringadd[SystemProperties]).+(other)
    Definition Classes
    any2stringadd
  2. def filter(p: ((String, String)) ⇒ Boolean): collection.TraversableOnce[(String, String)]
    Implicit
    This member is added by an implicit conversion from SystemProperties to MonadOps[(String, String)] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (systemProperties: MonadOps[(String, String)]).filter(p)
    Definition Classes
    MonadOps
  3. def flatMap[B](f: ((String, String)) ⇒ GenTraversableOnce[B]): collection.TraversableOnce[B]
    Implicit
    This member is added by an implicit conversion from SystemProperties to MonadOps[(String, String)] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (systemProperties: MonadOps[(String, String)]).flatMap(f)
    Definition Classes
    MonadOps
  4. def map[B](f: ((String, String)) ⇒ B): collection.TraversableOnce[B]
    Implicit
    This member is added by an implicit conversion from SystemProperties to MonadOps[(String, String)] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (systemProperties: MonadOps[(String, String)]).map(f)
    Definition Classes
    MonadOps
  5. def withFilter(p: ((String, String)) ⇒ Boolean): collection.Iterator[(String, String)]
    Implicit
    This member is added by an implicit conversion from SystemProperties to MonadOps[(String, String)] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (systemProperties: MonadOps[(String, String)]).withFilter(p)
    Definition Classes
    MonadOps

Deprecated Value Members

  1. def noTraceSupression: BooleanProp
    Implicit
    This member is added by an implicit conversion from SystemProperties to SystemProperties.type performed by method systemPropertiesToCompanion in scala.sys.SystemProperties.
    Definition Classes
    SystemProperties
    Annotations
    @deprecated
    Deprecated

    (Since version 2.12.0) use noTraceSuppression

Inherited from AbstractMap[String, String]

Inherited from Map[String, String]

Inherited from MapLike[String, String, Map[String, String]]

Inherited from collection.mutable.Cloneable[Map[String, String]]

Inherited from Cloneable

Inherited from java.lang.Cloneable

Inherited from Shrinkable[String]

Inherited from Builder[(String, String), Map[String, String]]

Inherited from Growable[(String, String)]

Inherited from Clearable

Inherited from collection.mutable.Iterable[(String, String)]

Inherited from collection.mutable.Traversable[(String, String)]

Inherited from Mutable

Inherited from AbstractMap[String, String]

Inherited from Map[String, String]

Inherited from MapLike[String, String, Map[String, String]]

Inherited from Subtractable[String, Map[String, String]]

Inherited from PartialFunction[String, String]

Inherited from (String) ⇒ String

Inherited from GenMap[String, String]

Inherited from GenMapLike[String, String, Map[String, String]]

Inherited from AbstractIterable[(String, String)]

Inherited from collection.Iterable[(String, String)]

Inherited from IterableLike[(String, String), Map[String, String]]

Inherited from Equals

Inherited from GenIterable[(String, String)]

Inherited from GenIterableLike[(String, String), Map[String, String]]

Inherited from AbstractTraversable[(String, String)]

Inherited from collection.Traversable[(String, String)]

Inherited from GenTraversable[(String, String)]

Inherited from GenericTraversableTemplate[(String, String), collection.mutable.Iterable]

Inherited from TraversableLike[(String, String), Map[String, String]]

Inherited from GenTraversableLike[(String, String), Map[String, String]]

Inherited from Parallelizable[(String, String), ParMap[String, String]]

Inherited from collection.TraversableOnce[(String, String)]

Inherited from GenTraversableOnce[(String, String)]

Inherited from FilterMonadic[(String, String), Map[String, String]]

Inherited from HasNewBuilder[(String, String), Map[String, String]]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion systemPropertiesToCompanion from SystemProperties to SystemProperties.type

Inherited by implicit conversion CollectionsHaveToParArray from SystemProperties to CollectionsHaveToParArray[SystemProperties, T]

Inherited by implicit conversion MonadOps from SystemProperties to MonadOps[(String, String)]

Inherited by implicit conversion any2stringadd from SystemProperties to any2stringadd[SystemProperties]

Inherited by implicit conversion StringFormat from SystemProperties to StringFormat[SystemProperties]

Inherited by implicit conversion Ensuring from SystemProperties to Ensuring[SystemProperties]

Inherited by implicit conversion ArrowAssoc from SystemProperties to ArrowAssoc[SystemProperties]

Inherited by implicit conversion alternateImplicit from SystemProperties to ForceImplicitAmbiguity

Ungrouped