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Add bimap to Either #121

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Merged
mperry merged 1 commit into from Apr 1, 2015
Merged

Add bimap to Either #121

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13 changes: 13 additions & 0 deletions core/src/main/java/fj/data/Either.java
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,19 @@ public final <X> X either(final F<A, X> left, final F<B, X> right) {
right.f(right().value());
}

/**
* Map the given functions across the appropriate side.
*
* @param left The function to map if this is left.
* @param right The function to map if this is right.
* @return A new either value after mapping with the appropriate function applied.
*/
public final <X, Y> Either<X, Y> bimap(final F<A, X> left, final F<B, Y> right) {
return isLeft() ?
left(left.f(left().value())) :
right(right.f(right().value()));
}

@Override
public boolean equals(Object other) {

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