final class RichBoolean extends AnyVal with OrderedProxy[Boolean]
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- RichBoolean
- OrderedProxy
- Typed
- Proxy
- Ordered
- Comparable
- AnyVal
- Any
- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
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Value Members
-
final
def
!=(arg0: Any): Boolean
Test two objects for inequality.
Test two objects for inequality.
- returns
trueif !(this == that), false otherwise.
- Definition Classes
- Any
-
final
def
##(): Int
Equivalent to
x.hashCodeexcept for boxed numeric types andnull.Equivalent to
x.hashCodeexcept for boxed numeric types andnull. 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. Fornullreturns a hashcode wherenull.hashCodethrows aNullPointerException.- returns
a hash value consistent with ==
- Definition Classes
- Any
-
def
+(other: String): String
- Implicit
- This member is added by an implicit conversion from RichBoolean to any2stringadd[RichBoolean] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
-
def
->[B](y: B): (RichBoolean, B)
- Implicit
- This member is added by an implicit conversion from RichBoolean to ArrowAssoc[RichBoolean] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @inline()
-
def
<(that: Boolean): Boolean
Returns true if
thisis less thanthatReturns true if
thisis less thanthat- Definition Classes
- Ordered
-
def
<=(that: Boolean): Boolean
Returns true if
thisis less than or equal tothat.Returns true if
thisis less than or equal tothat.- Definition Classes
- Ordered
-
final
def
==(arg0: Any): Boolean
Test two objects for equality.
Test two objects for equality. The expression
x == thatis equivalent toif (x eq null) that eq null else x.equals(that).- returns
trueif the receiver object is equivalent to the argument;falseotherwise.
- Definition Classes
- Any
-
def
>(that: Boolean): Boolean
Returns true if
thisis greater thanthat.Returns true if
thisis greater thanthat.- Definition Classes
- Ordered
-
def
>=(that: Boolean): Boolean
Returns true if
thisis greater than or equal tothat.Returns true if
thisis greater than or equal tothat.- Definition Classes
- Ordered
-
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 aClassCastExceptionat runtime, while the expressionList(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
ClassCastExceptionif the receiver object is not an instance of the erasure of typeT0.
-
def
compare(y: Boolean): Int
Result of comparing
thiswith operandthat.Result of comparing
thiswith operandthat.Implement this method to determine how instances of A will be sorted.
Returns
xwhere:x < 0whenthis < thatx == 0whenthis == thatx > 0whenthis > that
- Definition Classes
- OrderedProxy → Ordered
-
def
compareTo(that: Boolean): Int
Result of comparing
thiswith operandthat.Result of comparing
thiswith operandthat.- Definition Classes
- Ordered → Comparable
-
def
ensuring(cond: (RichBoolean) ⇒ Boolean, msg: ⇒ Any): RichBoolean
- Implicit
- This member is added by an implicit conversion from RichBoolean to Ensuring[RichBoolean] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: (RichBoolean) ⇒ Boolean): RichBoolean
- Implicit
- This member is added by an implicit conversion from RichBoolean to Ensuring[RichBoolean] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean, msg: ⇒ Any): RichBoolean
- Implicit
- This member is added by an implicit conversion from RichBoolean to Ensuring[RichBoolean] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean): RichBoolean
- Implicit
- This member is added by an implicit conversion from RichBoolean to Ensuring[RichBoolean] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
formatted(fmtstr: String): String
Returns string formatted according to given
formatstring.Returns string formatted according to given
formatstring. Format strings are as forString.format(@see java.lang.String.format).- Implicit
- This member is added by an implicit conversion from RichBoolean to Predef.StringFormat[RichBoolean] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
- Annotations
- @inline()
-
def
getClass(): Class[_ <: AnyVal]
Returns the runtime class representation of the object.
-
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 returnfalse, while the expressionList(1).isInstanceOf[List[String]]will returntrue. 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
trueif the receiver object is an instance of erasure of typeT0;falseotherwise.
- Definition Classes
- Any
-
def
ord: math.Ordering.Boolean.type
- Attributes
- protected
- Definition Classes
- RichBoolean → OrderedProxy
-
val
self: Boolean
- Definition Classes
- RichBoolean → Typed → Proxy
-
def
toString(): String
Returns a string representation of the object.
-
def
→[B](y: B): (RichBoolean, B)
- Implicit
- This member is added by an implicit conversion from RichBoolean to ArrowAssoc[RichBoolean] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int,Float,ArrayorOptionwhich are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collectionand its sub-packages contain Scala's collections frameworkscala.collection.immutable- Immutable, sequential data-structures such asVector,List,Range,HashMaporHashSetscala.collection.mutable- Mutable, sequential data-structures such asArrayBuffer,StringBuilder,HashMaporHashSetscala.collection.concurrent- Mutable, concurrent data-structures such asTrieMapscala.collection.parallel.immutable- Immutable, parallel data-structures such asParVector,ParRange,ParHashMaporParHashSetscala.collection.parallel.mutable- Mutable, parallel data-structures such asParArray,ParHashMap,ParTrieMaporParHashSetscala.concurrent- Primitives for concurrent programming such asFuturesandPromisesscala.io- Input and output operationsscala.math- Basic math functions and additional numeric types likeBigIntandBigDecimalscala.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.Predefobject are always in scope by default.Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example,
Listis an alias forscala.collection.immutable.List.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
Stringis an alias forjava.lang.String.