[AC-2821] V8 runtime defines Object.prototype.extend which breaks compatibility to qooxdoo javascript framework

GitHub Issue	n/a
Type	Bug
Priority	n/a
Status	Closed
Resolution	Duplicate
Resolution Date	2011-12-19T16:41:50.000+0000
Affected Version/s	n/a
Fix Version/s	n/a
Components	Titanium SDK & CLI
Labels	android, v8
Reporter	Dietrich Streifert
Assignee	Mauro Parra-Miranda
Created	2011-12-14T12:33:32.000+0000
Updated	2016-03-08T07:47:45.000+0000

Description

We are using the stripped down version of qooxdoo (http://www.qooxdoo.org) called qx-oo ( http://demo.qooxdoo.org/current/framework/qx-oo-noopt.js ). The qooxdoo class definition mechanism looks for the existence of an attribute called "extend" within the class definition arguments which are defined as an object with attributes. qooxdoo decides on the absence or existence of the attribute "extend" if a class has only statics or if the class is used for instantiation. Because of the defined "extend" attribute/function/method in Object.prototype.extend this mechanism breaks. The attempt to remove Object.prototype.extend via delete is ignored. Tests with standalone V8 on centos 6 showed that Object.prototype.extend is not defined there. So it is unique to the titanium android V8 derivate. On iOS qooxdoo is usable without any problems.

Comments

Dietrich Streifert 2011-12-15

Evaluating the code Object.prototype.extend.toString(); gives the following source code:

      function (other) {
         if (!other) return;
   	
         for (var name in other) {
            if (other.hasOwnProperty(name)) {
               this[name] = other[name];
            }
         }
   
         return this;
      }

Where does it come from?

Dietrich Streifert 2011-12-15

Q&A discussion on this topic: [http://developer.appcelerator.com/question/129475/v8-runtime-defines-objectprototypeextend-which-may-break-compatibility-to-javascript-framework]
Mauro Parra-Miranda 2013-11-24

DUP issue.

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