mapError()

const mapError: <E, G>(f) => <A>(fa) => TaskEither<G, A> = mapLeft

Alias for mapLeft.

Maps a function over the Left value.

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Type Parameters

E: E

The original error type.

G: G extends ErrorType

The new error type.

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Parameters

f: (e) => G

The mapping function.

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Returns: <A>(fa): TaskEither<G, A>

A function that transforms the TaskEither.

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Since

2.0.0