gistfile1.js

//
// ------------------------
// Class.Mixin.Delegator
// ------------------------
//
//  Usage:
//   adding:
//     - MyClass.addMethods(Class.Mixin);
//   usage (in MyClass):
//     this.delegate('element', 'observe', 'setPosition');
//

//= require<prototype>

Class.Mixin = {};
Class.Mixin.Delegator = (function(){
  function delege(to){
    var methods = Array.slice(arguments, 1), method;
    for(var i=0; i<methods.length; i++){
      this[method] = this[to][method].bind(this[to]);
    }
  }
  return {delegate: delegate};
})();