crocks/pointfree/merge.js

A collection of well known Algebraic Datatypes for your utter enjoyment.

/** @license ISC License (c) copyright 2016 original and current authors */
/** @author Ian Hofmann-Hicks (evil) */

var curry = require('../core/curry')
var isFunction = require('../core/isFunction')

function merge(fn, m) {
  if(!isFunction(fn)) {
    throw new TypeError('merge: Function required for first argument')
  }

  if(!(m && isFunction(m.merge))) {
    throw new TypeError('merge: Pair or Tuple required for second argument')
  }

  return m.merge(fn)
}

module.exports = curry(merge)