call() and apply() on steroids

many_args.js

Function.prototype.callMany = function (context) {
  var result = [];
  for (var i=1; i<arguments.length; i++) {
    result.push( this.call(context, arguments[i]) );
  }
  return result;
}

function hi (name) {
  return 'Hi '+ name + '!';
}

hi.callMany(this, 'John', 'Dean')  // ['Hi John!', 'Hi Dean!']



Function.prototype.applyMany = function (context) {
  var result = [];
  for (var i=1; i<arguments.length; i++) {
    result.push( this.apply(context, arguments[i]) );
  }
  return result;
}

function plus (x, y) {
  return x + y;
}

plus.applyMany(this, [1, 1], [2, 3])  // [2, 5]