LeftProjection (original) (raw)
scala.util.Either.LeftProjection
Projects an Either into a Left.
Attributes
See also
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Graph
Supertypes
Members list
Returns false if Right or returns the result of the application of the given function to the Left value.
Returns false if Right or returns the result of the application of the given function to the Left value.
Left(12).left.exists(_ > 10) // true
Left(7).left.exists(_ > 10) // false
Right(12).left.exists(_ > 10) // false
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Returns None if this is a Right or if the given predicate p does not hold for the left value, otherwise, returns a Left.
Returns None if this is a Right or if the given predicate p does not hold for the left value, otherwise, returns a Left.
Left(12).left.filterToOption(_ > 10) // Some(Left(12))
Left(7).left.filterToOption(_ > 10) // None
Right(12).left.filterToOption(_ > 10) // None
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Binds the given function across Left.
Binds the given function across Left.
Left(12).left.flatMap(x => Left("scala")) // Left("scala")
Right(12).left.flatMap(x => Left("scala")) // Right(12)
Value parameters
f
The function to bind across Left.
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Returns true if Right or returns the result of the application of the given function to the Left value.
Returns true if Right or returns the result of the application of the given function to the Left value.
Left(12).left.forall(_ > 10) // true
Left(7).left.forall(_ > 10) // false
Right(12).left.forall(_ > 10) // true
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Executes the given side-effecting function if this is a Left.
Executes the given side-effecting function if this is a Left.
Left(12).left.foreach(x => println(x)) // prints "12"
Right(12).left.foreach(x => println(x)) // doesn't print
Value parameters
f
The side-effecting function to execute.
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Returns the value from this Left or the given argument if this is a Right.
Returns the value from this Left or the given argument if this is a Right.
Left(12).left.getOrElse(17) // 12
Right(12).left.getOrElse(17) // 17
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Maps the function argument through Left.
Maps the function argument through Left.
Left(12).left.map(_ + 2) // Left(14)
Right[Int, Int](12).left.map(_ + 2) // Right(12)
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Returns a Some containing the Left value if it exists or a None if this is a Right.
Returns a Some containing the Left value if it exists or a None if this is a Right.
Left(12).left.toOption // Some(12)
Right(12).left.toOption // None
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Returns a Seq containing the Left value if it exists or an empty Seq if this is a Right.
Returns a Seq containing the Left value if it exists or an empty Seq if this is a Right.
Left(12).left.toSeq // Seq(12)
Right(12).left.toSeq // Seq()
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Returns None if this is a Right or if the given predicate p does not hold for the left value, otherwise, returns a Left.
Returns None if this is a Right or if the given predicate p does not hold for the left value, otherwise, returns a Left.
Left(12).left.filter(_ > 10) // Some(Left(12))
Left(7).left.filter(_ > 10) // None
Right(12).left.filter(_ > 10) // None
Attributes
Deprecated
[Since version 2.13.0] Use `filterToOption`, which more accurately reflects the return type
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Returns the value from this Left or throws NoSuchElementException if this is a Right.
Returns the value from this Left or throws NoSuchElementException if this is a Right.
Left(12).left.get // 12
Right(12).left.get // NoSuchElementException
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Throws
Deprecated
[Since version 2.13.0] use `Either.swap.getOrElse` instead
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An iterator over the names of all the elements of this product.
An iterator over the names of all the elements of this product.
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Inherited from:
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An iterator over all the elements of this product.
An iterator over all the elements of this product.
Attributes
Returns
in the default implementation, an Iterator[Any]
Inherited from:
Source
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