Skip to main content

liftNullable()

liftNullable<A, B, E>(f, onNullable): (...a) => Either<E, NonNullable<B>>

Lifts a function that may return null/undefined to return an Either.

Type Parameters​

A: A extends readonly unknown[]​

The argument types.

B: B​

The return type.

E: E​

The error type.

Parameters​

f: (...a) => Nullish<B>​

The function to lift.

onNullable: (...a) => E​

Function to create error for null/undefined.

Returns​

A lifted function that returns an Either.

Since​

2.0.0