True. Just find out. But Chrome's console yield undefined to me...Weird. Edit: find the reason. It is because I am trying to assign a property to int. Seems JS

True. Just find out. But Chrome's console yield undefined to me...Weird. Edit: find the reason. It is because I am trying to assign a property to int. Seems JS won't allow this to primitive type? Edit: Python won't allow assignment to primitive type bject either. The handling is the same.