Re: Array foreach in scripting languages

What's confusing is that your code uses the name DynamicArray (which I 
suppose is close to ArrayList in .NET), and your C++ test sample 
probably used std::vector, but you keep referring to the container as a 
"list". They are very different kinds of containers.

You will note that C++ allows you to insert and delete objects in a 
std::list, but not in a std::vector. The reason is that vectors are 
guaranteed to be contiguous, and thus iterators (which may be simple 
pointers) would get invalidated when resizing the underlying storage. 
Meanwhile, when deleting from a list, the only iterator that gets 
invalidated is an iterator pointing to the element being deleted.

Cheers,

                      / h+


Carsten Orthbandt wrote:
> The obvious question is how should an active iterator react if the traversed list
> changes? To answer this, I simply tried it out in two languages I know that do
> provide both dynamic arrays and foreach: STL, Tcl and C#.
>   



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