fold

fold<E, A, B>(onInvalid, onValid): (data) => B

Extracts the value from a Validation by providing handlers for both cases.

Type Parameters

E

A

B

(errors) => B

(a) => B

(data): B

B

pipe(
  Validation.of(42),
  Validation.fold(
    errors => `Errors: ${errors.join(", ")}`,
    value => `Value: ${value}`
  )
);