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orElseW()

orElseW<E1, E2, B>(onLeft): <A>(ma) => Either<E2, B | A>

Recovers from a Left by applying a function with widened error type.

Type Parameters​

E1: E1​

The original error type.

E2: E2​

The new error type.

B: B​

The new success type.

Parameters​

onLeft: (e) => Either<E2, B>​

Handler for Left case.

Returns: <A>(ma): Either<E2, B | A>​

A function that transforms the Either.

Since​

2.0.0