Excellent - that's spot on! OK, so I now have a question: doesn't the plain 
$lookup{$1}

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create the key (and assign a value of null) if the key does not exist? Is it not better to do either "defined" or "exists" for the key? Anyway, my failing was the braces - getting that right made it work. many thanks...


-- Ian Stuart
A man depriving some poor village, somewhere, of a first-class idiot.

In reply to Re^2: regex & variable substitution by kiz
in thread regex & variable substitution by kiz

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