++. It looks like I forgot to test my code for false values (it took me a while to see where they wouldn't work, it was the very last line where I iterate while the value is true).

Thanks for the correction, for some reason I'm still not sure I would have thought of it even nowadays. I suppose I don't really think about using the number of returned values when I'm expecting a scalar, rather than a list

In reply to Re^3: An iterator for (not "iterating") a recursive data structure. by Eily
in thread An iterator for (not "iterating") a recursive data structure. by BrowserUk

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