Thank you again for elaborating on your earlier reply. I can see from your examples how localisation is necessary to avoid, for example, @memoList getting too many 'b's. There is one thing that is confusing me though. In the second and third patterns I don't understand the significance of the extra (memory group?) brackets around the code block (?{...}), as in ((?{ @memoList = @{$^R} })) and ((?{ @memoList = @temp })). Why do we need these when we are assigning within the pattern rather than having to remember outside of it? I must be missing something.

Cheers,

JohnGG

In reply to Re^4: Recursive regular expression weirdness by johngg
in thread Recursive regular expression weirdness by johngg

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