scala.util.Either.LeftBias.withEmptyToken
Ops
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package withEmptyToken
Test two objects for inequality.
Test two objects for inequality.
true if !(this == that), false otherwise.
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.
a hash value consistent with ==
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).
the object to compare against this object for equality.
true if the receiver object is equivalent to the argument; false otherwise.
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.
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.
Returns true if this wrapper represents a left-biased Either wrapping a Left or a
right-biased Either wrapping a Right.
Returns true if this wrapper represents a left-biased Either wrapping a Left or a
right-biased Either wrapping a Right. Returns false if the bias of this wrapper is not
consistent with the type of the target Either.
It is safe to call get on a biased Either for which conformsToBias is true.
It is safe to call xget on a biased Either for which conformsToBias is false.
Tests whether the argument (arg0) is a reference to the receiver object (this).
Tests whether the argument (arg0) 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.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.
The equality method for reference types.
Returns false if the target left-biased Either is a Right or returns the result of the application of
the given function to the Left value.
Returns false if the target left-biased Either is a Right or returns the result of the application of
the given function to the Left value.
Left(12).exists(_ > 10) // true Left(7).exists(_ > 10) // false Right(12).exists(_ > 10) // false
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.
Binds the given function across Left of the target left-biased Either.
Binds the given function across Left of the target left-biased Either.
Left(12).flatMap(x => Left("scala")) // Left("scala") Right(12).flatMap(x => Right("scala") // Right(12)
The function to bind across Left.
Returns true if the target left-biased Either is Right or returns
the result of the application of the given function to the Left value.
Returns true if the target left-biased Either is Right or returns
the result of the application of the given function to the Left value.
Left(12).forall(_ > 10) // true Left(7).forall(_ > 10) // false Right(12).forall(_ > 10) // true
Executes the given side-effecting function if the target left-biased Either is a Left.
Executes the given side-effecting function if the target left-biased Either is a Left.
Left(12).foreach(x => println(x)) // prints "12" Right(12).foreach(x => println(x)) // doesn't print
The side-effecting function to execute.
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).
Returns the value if the target left-biased Either is a Left or
throws java.util.NoSuchElementException if the target is a Right.
Returns the value if the target left-biased Either is a Left or
throws java.util.NoSuchElementException if the target is a Right.
Left(12).get // 12 Right(12).get // NoSuchElementException
java.util.NoSuchElementException if the target is scala.util.Right
A representation that corresponds to the dynamic class of the receiver object.
A representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
a representation that corresponds to the dynamic class of the receiver object.
not specified by SLS as a member of AnyRef
Returns the value from the target left-biased Either if it is a Left,
or the argument or if it is a Right.
Returns the value from the target left-biased Either if it is a Left,
or the argument or if it is a Right.
Left(12).getOrElse(17) // 12 Right(12).getOrElse(17) // 17
The hashCode method for reference types.
Returns true if this left-biased Either is a Right
that contains the empty token, signifying empty.
Returns true if this left-biased Either is a Right
that contains the empty token, signifying empty. Returns false
for any other error or value.
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.
true if the receiver object is an instance of erasure of type T0; false otherwise.
Returns true when called on a wrapper representing a left-biased Either, false otherwise.
Returns true when called on a wrapper representing a left-biased Either, false otherwise.
Returns true when called on a wrapper representing a right-biased Either, false otherwise.
Returns true when called on a wrapper representing a right-biased Either, false otherwise.
Maps the function argument through Left of the target left-biased Either.
Maps the function argument through Left of the target left-biased Either.
Left(12).map(_ + 2) // Left(14) Right(12).map(_ + 2) // Right(12)
Equivalent to !(this eq that).
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.
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.
Wakes up all threads that are waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
If the target left-biased Either is a Right containing the empty token,
returns a Right containing replacement.
If the target left-biased Either is a Right containing the empty token,
returns a Right containing replacement. Otherwise returns the target Either unchanged.
// with empty token Int -1 Left(12).replaceIfEmpty(99) // Left(12) Left(-1).replaceIfEmpty(99) // Left(-1) Right(12).replaceIfEmpty(99) // Right(12) Right(-1).replaceIfEmpty(99) // Right(99)
Returns a Some containing the Left value of the target left-biased Either if it exists or a
None if the target is a Right.
Returns a Some containing the Left value of the target left-biased Either if it exists or a
None if the target is a Right.
Left(12).toOption // Some(12) Right(12).toOption // None
Returns a Seq containing the Left value if it exists or an empty
Seq if the target left-biased Either is a Right.
Returns a Seq containing the Left value if it exists or an empty
Seq if the target left-biased Either is a Right.
Left(12).toSeq // Seq(12) Right(12).toSeq // Seq()
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
a String representation of the object.
Returns the target left-biased Either unchanged if it is a Left and the predicate p
holds for its value, or if it is any Right.
Returns the target left-biased Either unchanged if it is a Left and the predicate p
holds for its value, or if it is any Right.
Returns a Right containing the empty token if the target is a Left but predicate p
fails to hold. If no empty token has been set, a java.util.NoSuchElementException will
be thrown.
val LeftBias = LeftBias.withEmptyToken[Int](-1); import LeftBias._ Left(12).withFilter(_ > 10) // Left(12) Left(7).withFilter(_ > 10) // Right(-1) Right(12).withFilter(_ > 10) // Right(12)
"cross-get" -- Returns the value if the target left-biased Either
does not conform to its bias, that is, if it is a Right.
"cross-get" -- Returns the value if the target left-biased Either
does not conform to its bias, that is, if it is a Right.
Throws java.util.NoSuchElementException if the target is a Left.
Left(12).xget // NoSuchElementException Right(12).xget // 12
java.util.NoSuchElementException if the target is scala.util.Left
"cross-getOrElse" -- Returns the value from the target left-biased Either
if it does not conform to its bias and is a Right.
"cross-getOrElse" -- Returns the value from the target left-biased Either
if it does not conform to its bias and is a Right.
Returns the argument or if it is a Left.
Right(12).xgetOrElse(17) // 12 Left(12).xgetOrElse(17) // 17
"cross-map" -- Maps the function argument through Right against the bias the target left-biased Either.
"cross-map" -- Maps the function argument through Right against the bias the target left-biased Either.
Left(12).map(_ + 2) // Left(12) Right(12).map(_ + 2) // Right(14)
Implements the operations of a left-biased
Either, whose specific behavior -- especially with respect to handling of an empty value resulting from a filter or failed pattern match -- is defined by constructor argumentopsTypeClass.Please see LeftBias