good chemistry is complicated,and a little bit messy -LW PerlMonks

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japhy,
Thanks - which is why I said this deserved an entry in "Perl Idioms Explained". I could argue that there is no assignment going on in:
while ( @array ) { ... }
# or
print "Array is empty\n" if ! @array;
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but then we could discuss the difference between lists and arrays and it wouldn't be worth it. I think I was able to get the OP to understand even if I wasn't completely accurate. I do think it would make for a good entry in "Perl Idioms Explained".

Cheers - L~R

In reply to Re^3: Longest repeated string... by Limbic~Region
in thread Longest repeated string... by Yzzyx

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