moy-fp/src/Function/comparator.js

A functional programming library.

import curry from './curry'

/**
 * ((a, b) -> Boolean) -> ((a, b) -> Number)
 */
const comparator = curry(
  pred => curry(
    (a, b) => pred(a, b) ? -1 : pred(b, a) ? 1 : 0
  )
)

export default comparator