object IndexedSeq extends SeqFactory[IndexedSeq]
This object provides a set of operations to create
values.
The current default implementation of a mutable.IndexedSeq
mutable.IndexedSeq
is an ArrayBuffer
.
- Source
- IndexedSeq.scala
- Alphabetic
- By Inheritance
- IndexedSeq
- SeqFactory
- TraversableFactory
- GenericSeqCompanion
- GenSeqFactory
- GenTraversableFactory
- GenericCompanion
- AnyRef
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Type Members
-
class
GenericCanBuildFrom[A] extends CanBuildFrom[CC[_], A, CC[A]]
A generic implementation of the
CanBuildFrom
trait, which forwards all calls toapply(from)
to thegenericBuilder
method of collectionfrom
, and which forwards all calls ofapply()
to thenewBuilder
method of this factory.A generic implementation of the
CanBuildFrom
trait, which forwards all calls toapply(from)
to thegenericBuilder
method of collectionfrom
, and which forwards all calls ofapply()
to thenewBuilder
method of this factory.- Definition Classes
- GenTraversableFactory
Value Members
-
def
ReusableCBF: GenericCanBuildFrom[Nothing]
- Definition Classes
- GenTraversableFactory
-
def
apply[A](elems: A*): IndexedSeq[A]
Creates a collection with the specified elements.
Creates a collection with the specified elements.
- A
the type of the collection's elements
- elems
the elements of the created collection
- returns
a new collection with elements
elems
- Definition Classes
- GenericCompanion
- implicit def canBuildFrom[A]: CanBuildFrom[Coll, A, IndexedSeq[A]]
-
def
concat[A](xss: collection.Traversable[A]*): IndexedSeq[A]
Concatenates all argument collections into a single collection.
Concatenates all argument collections into a single collection.
- xss
the collections that are to be concatenated.
- returns
the concatenation of all the collections.
- Definition Classes
- GenTraversableFactory
-
def
empty[A]: IndexedSeq[A]
An empty collection of type
CC
[A]An empty collection of type
CC
[A]- A
the type of the collection's elements
- Definition Classes
- GenericCompanion
-
def
fill[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: ⇒ A): IndexedSeq[IndexedSeq[IndexedSeq[IndexedSeq[IndexedSeq[A]]]]]
Produces a five-dimensional collection containing the results of some element computation a number of times.
Produces a five-dimensional collection containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3nd dimension
- n4
the number of elements in the 4th dimension
- n5
the number of elements in the 5th dimension
- elem
the element computation
- returns
A collection that contains the results of
n1 x n2 x n3 x n4 x n5
evaluations ofelem
.
- Definition Classes
- GenTraversableFactory
-
def
fill[A](n1: Int, n2: Int, n3: Int, n4: Int)(elem: ⇒ A): IndexedSeq[IndexedSeq[IndexedSeq[IndexedSeq[A]]]]
Produces a four-dimensional collection containing the results of some element computation a number of times.
Produces a four-dimensional collection containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3nd dimension
- n4
the number of elements in the 4th dimension
- elem
the element computation
- returns
A collection that contains the results of
n1 x n2 x n3 x n4
evaluations ofelem
.
- Definition Classes
- GenTraversableFactory
-
def
fill[A](n1: Int, n2: Int, n3: Int)(elem: ⇒ A): IndexedSeq[IndexedSeq[IndexedSeq[A]]]
Produces a three-dimensional collection containing the results of some element computation a number of times.
Produces a three-dimensional collection containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3nd dimension
- elem
the element computation
- returns
A collection that contains the results of
n1 x n2 x n3
evaluations ofelem
.
- Definition Classes
- GenTraversableFactory
-
def
fill[A](n1: Int, n2: Int)(elem: ⇒ A): IndexedSeq[IndexedSeq[A]]
Produces a two-dimensional collection containing the results of some element computation a number of times.
Produces a two-dimensional collection containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- elem
the element computation
- returns
A collection that contains the results of
n1 x n2
evaluations ofelem
.
- Definition Classes
- GenTraversableFactory
-
def
fill[A](n: Int)(elem: ⇒ A): IndexedSeq[A]
Produces a collection containing the results of some element computation a number of times.
Produces a collection containing the results of some element computation a number of times.
- n
the number of elements contained in the collection.
- elem
the element computation
- returns
A collection that contains the results of
n
evaluations ofelem
.
- Definition Classes
- GenTraversableFactory
-
def
iterate[A](start: A, len: Int)(f: (A) ⇒ A): IndexedSeq[A]
Produces a collection containing repeated applications of a function to a start value.
Produces a collection containing repeated applications of a function to a start value.
- start
the start value of the collection
- len
the number of elements contained in the collection
- f
the function that's repeatedly applied
- returns
a collection with
len
values in the sequencestart, f(start), f(f(start)), ...
- Definition Classes
- GenTraversableFactory
-
def
newBuilder[A]: Builder[A, IndexedSeq[A]]
The default builder for
objects.mutable.IndexedSeq
The default builder for
objects.mutable.IndexedSeq
- A
the type of the mutable indexed sequence's elements
- Definition Classes
- IndexedSeq → GenericCompanion
-
def
range[T](start: T, end: T, step: T)(implicit arg0: Integral[T]): IndexedSeq[T]
Produces a collection containing equally spaced values in some integer interval.
Produces a collection containing equally spaced values in some integer interval.
- start
the start value of the collection
- end
the end value of the collection (the first value NOT contained)
- step
the difference between successive elements of the collection (must be positive or negative)
- returns
a collection with values
start, start + step, ...
up to, but excludingend
- Definition Classes
- GenTraversableFactory
-
def
range[T](start: T, end: T)(implicit arg0: Integral[T]): IndexedSeq[T]
Produces a collection containing a sequence of increasing of integers.
Produces a collection containing a sequence of increasing of integers.
- start
the first element of the collection
- end
the end value of the collection (the first value NOT contained)
- returns
a collection with values
start, start + 1, ..., end - 1
- Definition Classes
- GenTraversableFactory
-
def
tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) ⇒ A): IndexedSeq[IndexedSeq[IndexedSeq[IndexedSeq[IndexedSeq[A]]]]]
Produces a five-dimensional collection containing values of a given function over ranges of integer values starting from 0.
Produces a five-dimensional collection containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3nd dimension
- n4
the number of elements in the 4th dimension
- n5
the number of elements in the 5th dimension
- f
The function computing element values
- returns
A collection consisting of elements
f(i1, i2, i3, i4, i5)
for0 <= i1 < n1
,0 <= i2 < n2
,0 <= i3 < n3
,0 <= i4 < n4
, and0 <= i5 < n5
.
- Definition Classes
- GenTraversableFactory
-
def
tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) ⇒ A): IndexedSeq[IndexedSeq[IndexedSeq[IndexedSeq[A]]]]
Produces a four-dimensional collection containing values of a given function over ranges of integer values starting from 0.
Produces a four-dimensional collection containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3nd dimension
- n4
the number of elements in the 4th dimension
- f
The function computing element values
- returns
A collection consisting of elements
f(i1, i2, i3, i4)
for0 <= i1 < n1
,0 <= i2 < n2
,0 <= i3 < n3
, and0 <= i4 < n4
.
- Definition Classes
- GenTraversableFactory
-
def
tabulate[A](n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) ⇒ A): IndexedSeq[IndexedSeq[IndexedSeq[A]]]
Produces a three-dimensional collection containing values of a given function over ranges of integer values starting from 0.
Produces a three-dimensional collection containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3nd dimension
- f
The function computing element values
- returns
A collection consisting of elements
f(i1, i2, i3)
for0 <= i1 < n1
,0 <= i2 < n2
, and0 <= i3 < n3
.
- Definition Classes
- GenTraversableFactory
-
def
tabulate[A](n1: Int, n2: Int)(f: (Int, Int) ⇒ A): IndexedSeq[IndexedSeq[A]]
Produces a two-dimensional collection containing values of a given function over ranges of integer values starting from 0.
Produces a two-dimensional collection containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- f
The function computing element values
- returns
A collection consisting of elements
f(i1, i2)
for0 <= i1 < n1
and0 <= i2 < n2
.
- Definition Classes
- GenTraversableFactory
-
def
tabulate[A](n: Int)(f: (Int) ⇒ A): IndexedSeq[A]
Produces a collection containing values of a given function over a range of integer values starting from 0.
Produces a collection containing values of a given function over a range of integer values starting from 0.
- n
The number of elements in the collection
- f
The function computing element values
- returns
A collection consisting of elements
f(0), ..., f(n -1)
- Definition Classes
- GenTraversableFactory
-
def
unapplySeq[A](x: IndexedSeq[A]): Some[IndexedSeq[A]]
This method is called in a pattern match { case Seq(...) => }.
This method is called in a pattern match { case Seq(...) => }.
- x
the selector value
- returns
sequence wrapped in an option, if this is a Seq, otherwise none
- Definition Classes
- SeqFactory
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int
,Float
,Array
orOption
which are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collection
and its sub-packages contain Scala's collections frameworkscala.collection.immutable
- Immutable, sequential data-structures such asVector
,List
,Range
,HashMap
orHashSet
scala.collection.mutable
- Mutable, sequential data-structures such asArrayBuffer
,StringBuilder
,HashMap
orHashSet
scala.collection.concurrent
- Mutable, concurrent data-structures such asTrieMap
scala.collection.parallel.immutable
- Immutable, parallel data-structures such asParVector
,ParRange
,ParHashMap
orParHashSet
scala.collection.parallel.mutable
- Mutable, parallel data-structures such asParArray
,ParHashMap
,ParTrieMap
orParHashSet
scala.concurrent
- Primitives for concurrent programming such asFutures
andPromises
scala.io
- Input and output operationsscala.math
- Basic math functions and additional numeric types likeBigInt
andBigDecimal
scala.sys
- Interaction with other processes and the operating systemscala.util.matching
- Regular expressionsOther 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 forscala.collection.immutable.List
.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
String
is an alias forjava.lang.String
.