fold

fold<S, A>(opt): <B>(onNone, onSome) => (s) => B

Defined in: Core/Optional.ts:134

Extracts a value from an Optional focus using handlers for the present and absent cases.

Type Parameters

S

S

A

A

Parameters

opt

Optional<S, A>

Returns

<B>(onNone, onSome) => (s) => B

Example

pipe(profile, Optional.fold(bioOpt)(() => "no bio", (bio) => bio.toUpperCase()));