crocks/helpers/partial.js

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

/** @license ISC License (c) copyright 2017 original and current authors */
/** @author Ian Hofmann-Hicks (evil) */

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

// partial : ((* -> c), *) -> * -> c
function partial() {
  var args = [], len = arguments.length;
  while ( len-- ) args[ len ] = arguments[ len ];

  var fn = args[0]
  var xs = args.slice(1)

  if(!isFunction(fn)) {
    throw new TypeError('partial: Function required for first argument')
  }

  return curry(
    Function.bind.apply(fn, [ null ].concat(xs))
  )
}

module.exports = partial