modifyE method

Evaluation<E, R, W, S, Unit> modifyE(
  1. Either<E, S> f(
    1. S s
    )
)

Implementation

Evaluation<E, R, W, S, Unit> modifyE(Either<E, S> f(S s)) => new Evaluation(_W, (r, s) => new Future.value(f(s).map((s2) => new Tuple3(_W.zero(), s2, unit))));