I doubt that's autovivification.

x++ means x+=1 means x=x+1

I expect this to work in many languages, where undef+1 yields 1

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^3: regex, find words that occur more than once. by LanX
in thread regex, find words that occur more than once. by Anonymous Monk

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