Test two objects for inequality.
true
if !(this == that), false otherwise.
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
.
a hash value consistent with ==
The expression x == that
is equivalent to if (x eq null) that eq null else x.equals(that)
.
true
if the receiver object is equivalent to the argument; false
otherwise.
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.
the receiver object.
ClassCastException
if the receiver object is not an instance of the erasure of type T0
.
Create a copy of the receiver object.
The default implementation of the clone
method is platform dependent.
a copy of the receiver object.
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:
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
).
true
if the argument is a reference to the receiver object; false
otherwise.
Returns false
if Left
or returns the result of the application of the given function to the Right
value.
Right(12).right.exists(_ > 10) // true Right(7).right.exists(_ > 10) // false Left(12).right.exists(_ > 10) // false
Returns None
if this is a Left
or if the given predicate p
does not hold for the right value, otherwise, returns a Right
.
Right(12).right.filterToOption(_ > 10) // Some(Right(12)) Right(7).right.filterToOption(_ > 10) // None Left(12).right.filterToOption(_ > 10) // None
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.
Binds the given function across Right
.
The function to bind across Right
.
Returns true
if Left
or returns the result of the application of the given function to the Right
value.
Right(12).right.forall(_ > 10) // true Right(7).right.forall(_ > 10) // false Left(12).right.forall(_ > 10) // true
Executes the given side-effecting function if this is a Right
.
Right(12).right.foreach(x => println(x)) // prints "12" Left(12).right.foreach(x => println(x)) // doesn't print
The side-effecting function to execute.
Returns string formatted according to given format
string. Format strings are as for String.format
(@see java.lang.String.format).
Returns the runtime class representation of the object.
a class object corresponding to the runtime type of the receiver.
Returns the value from this Right
or the given argument if this is a Left
.
Right(12).right.getOrElse(17) // 12 Left(12).right.getOrElse(17) // 17
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.
true
if the receiver object is an instance of erasure of type T0
; false
otherwise.
The given function is applied if this is a Right
.
Right(12).right.map(x => "flower") // Result: Right("flower") Left(12).right.map(x => "flower") // Result: Left(12)
Equivalent to !(this eq that)
.
true
if the argument is not a reference to the receiver object; false
otherwise.
Wakes up a single thread that is waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Wakes up all threads that are waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
An iterator over the names of all the elements of this product.
Returns a Some
containing the Right
value if it exists or a None
if this is a Left
.
Right(12).right.toOption // Some(12) Left(12).right.toOption // None
Returns a Seq
containing the Right
value if it exists or an empty Seq
if this is a Left
.
Right(12).right.toSeq // Seq(12) Left(12).right.toSeq // Seq()
© 2002-2019 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://www.scala-lang.org/api/2.13.0/scala/util/Either$$RightProjection.html
Projects an
Either
into aRight
.Because
Either
is already right-biased, this class is not normally needed. (It is retained in the library for now for easy cross-compilation between Scala 2.11 and 2.12.)(Since version 2.13.0) Either is now right-biased, calls to
right
should be removed