Function mapState

mapState<S, A, B>(
fn: (a: [A, S]) => [B, S],
): (s: State.State<S, A>) => State.State<S, B>
Maps both the return value and final state of the computation by fn.
Type Parameters
- S
- A
- B
Parameters
- fn: (a: [A, S]) => [B, S]
  The mapper between the result of computation.
Returns (s: State.State<S, A>) => State.State<S, B>
The mapped computation.
- Defined in src/state.ts:212