scala.util.Either.LeftProjection
Projects an Either into a Left.
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
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
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)
The function to bind across Left.
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
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
The side-effecting function to execute.
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
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)
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
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()
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
[Since version 2.13.0] Use `filterToOption`, which more accurately reflects the return type
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
[Since version 2.13.0] use `Either.swap.getOrElse` instead
An iterator over the names of all the elements of this product.
An iterator over the names of all the elements of this product.
AttributesAn iterator over all the elements of this product.
An iterator over all the elements of this product.
Attributesin the default implementation, an Iterator[Any]
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