Object::toString() and Object::equal(obj)

Object_toString_equal_expansion

Object.prototype.toString = function() {
    var key, result, val;
    result = ["{"];
    for (key in this) {
      val = this[key];
      result = result.concat(key, ":", val, ",");
    }
    result.pop();
    return (result.concat("}")).join("");
  };

///////////////////////////////////////////////////////////////////////////////////////////////
/* coffeescript
Object::equal = (obj)->
	success = yes
	try
		((o1,o2)->
			(return null if (not o2[key]?) or (o2[key] isnt o1[key])) for key of o1
			return arguments.callee
		)(obj,this)(this,obj)
	catch e
		success = no
	return success
*/



  Object.prototype.equal = function(obj) {
    var success;
    success = true;
    try {
      (function(o1, o2) {
        var key;
        for (key in o1) {
          if ((!(o2[key] != null)) || (o2[key] !== o1[key])) return null;
        }
        return arguments.callee;
      })(obj, this)(this, obj);
    } catch (e) {
      success = false;
    }
    return success;
  };