filterOrElse()

filterOrElse<A, E>(predicate, onFalse): (self) => Either<E, A>

Filters the Right value with a predicate, returning Left if it fails.

---

Type Parameters

A: A

The success type.

E: E

The error type.

---

Parameters

predicate: (a) => boolean

The predicate to test.

onFalse: (a) => E

Function to create error when predicate fails.

---

Returns

A function that filters the Either.

---

Since

2.0.0