the worst idea ever!

example.js

var Thing = Weird.extend({

  myProp: 'hello',

  getMyProp: function () {
    return myProp;
  },

  setMyProp: function (value) {
    myProp = value;
  }

});

Thing.getMyProp(); // => 'hello'
Thing.setMyProp('goodbye'); // => 'goodbye'
Thing.myProp; // => 'goodbye'

weird.js

var Weird = (function () {

  function getParamNames (func) {
    if (func.length === 0) return [];

    var rFnArgs = /^function\s*[^(]*\(([^)]+)\)/;
    var match = rFnArgs.exec(removeComments(func.toString()));

    if (!match) return [];

    return match[1].split(',').map(function (el) {
      return el.trim();
    });
  }

  function getFunctionBody(fn) {
    var s = removeComments(fn.toString());
    return s.substring(s.indexOf('{')+1, s.lastIndexOf('}'));
  }

  function removeComments(str) {
    var rComments = /(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg;
    return str.replace(rComments, '');
  }

  function wrap (obj, func) {
    var stuffs = getParamNames(func);
    var body = 'with (this) {' + getFunctionBody(func) + '}';

    stuffs.push(body);

    return Function.apply(null, stuffs);
  }

  function extend (obj) {
    var wrapped = {};

    for (var i in obj) {
      if (obj.hasOwnProperty(i)) {
        if (typeof obj[i] === 'function') {
          wrapped[i] = wrap(obj, obj[i]);
        } else {
          wrapped[i] = obj[i];
        }
        
      }
    }

    return wrapped;
  }

  return {
    extend: extend
  };

}());