bind.js

function bind(fn, context) {
  return function () {
    return fn.apply(context, arguments);
  }
}

function hey() {
  console.log(this, arguments);
  return 'moist';
}

var w1 = hey.bind('oy');
var w2 = bind(hey, 'oy');

console.log(w1(1,2,3));
console.log(w2(1,2,3));