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

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

Implementation

static Either<L, D> map3<L, A, A2 extends A, B, B2 extends B, C, C2 extends C, D>(Either<L, A2> fa, Either<L, B2> fb, Either<L, C2> fc, D fun(A a, B b, C c)) =>
  fa.fold(left, (a) => fb.fold(left, (b) => fc.fold(left, (c) => right(fun(a, b, c)))));