map3<A, A2 extends A, B, B2 extends B, C, C2 extends C, D> static method

Option<D> map3<A, A2 extends A, B, B2 extends B, C, C2 extends C, D>(
  1. Option<A2> fa,
  2. Option<B2> fb,
  3. Option<C2> fc,
  4. D fun(
    1. A a,
    2. B b,
    3. C c
    ),
)

Implementation

static Option<D> map3<A, A2 extends A, B, B2 extends B, C, C2 extends C, D>(Option<A2> fa, Option<B2> fb, Option<C2> fc, D fun(A a, B b, C c)) =>
  fa.fold(none, (a) => fb.fold(none, (b) => fc.fold(none, (c) => some(fun(a, b, c)))));