Function on

on<T, U, R>(op: (x: U, y: U) => R, f: (x: T) => U): (x: T, y: T) => R
Combines the results of two arguments using a projection.

Effectively, on(op, f)(x, y) = op(f(x), f(y)).
Type Parameters
- T
  type of the item
- U
  type of the projected result
- R
  type of the result
Parameters
- op: (x: U, y: U) => R
  the combiner
- f: (x: T) => U
  the projection
Returns (x: T, y: T) => R
- Defined in src/on.ts:13