karmen/node_modules/es5-ext/function/#/compose.js

"use strict";

var callable = require("../../object/valid-callable")
  , aFrom    = require("../../array/from")
  , apply    = Function.prototype.apply
  , call     = Function.prototype.call
  , callFn   = function (arg, fn) {
	return call.call(fn, this, arg);
};

module.exports = function (fn /*, …fnn*/) {
	var fns, first;
	if (!fn) callable(fn);
	fns = [this].concat(aFrom(arguments));
	fns.forEach(callable);
	fns = fns.reverse();
	first = fns[0];
	fns = fns.slice(1);
	return function (argIgnored) {
		return fns.reduce(callFn, apply.call(first, this, arguments));
	};
};