JavaScript Function.prototype.bind.js

Function.prototype.bind = function (ctx) {
  var self = this;
  var nativeSlice = Array.prototype.slice;
  
  var args = nativeSlice.call(arguments, 1);
  return function () {
    var bindArgs = args.concat(nativeSlice.call(arguments));
    return self.apply(ctx, bindArgs);
  }
}