Issue 33: API method to enumerate properties
http://code.google.com/p/v8/issues/detail?id=33

Comment #4 by nicolas.alvarez:
Why would the object change during iteration?

In any case, the solution is simple. "If you modify an object while  
iterating over
its its properties, you get to keep the pieces." Make the operation  
undefined.
Standard STL containers don't work very well either if you change stuff  
while
iterating. A std::vector, for example, may have to resize itself if you add  
elements,
making all existing iterators invalid.




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