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@nlozgachev/pipekit

mapError

mapError<E, F, A>(f): (data) => Result<F, A>

Defined in: Core/Result.ts:99

Transforms the error value inside an Result.

Type Parameters

Section titled “Type Parameters”

E

Section titled “E”

E

F

Section titled “F”

F

A

Section titled “A”

A

Parameters

Section titled “Parameters”

f

Section titled “f”

(e) => F

Returns

Section titled “Returns”

(data): Result<F, A>

Parameters

Section titled “Parameters”

data

Section titled “data”

Result<E, A>

Returns

Section titled “Returns”

Result<F, A>

Example

Section titled “Example”
pipe(Result.err("oops"), Result.mapError(e => e.toUpperCase())); // Err("OOPS")