modify

modify<S, A>(lens): (f) => (s) => S

Defined in: Core/Lens.ts:89

Applies a function to the focused value, returning a new structure.

Type Parameters

S

S

A

A

Parameters

lens

Lens<S, A>

Returns

(f): (s) => S

Parameters

f

(a) => A

Returns

(s): S

Parameters

s

S

Returns

S

Example

pipe(user, Lens.modify(nameLens)(n => n.toUpperCase())); // "ALICE"