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A zero-width negative look-behind assertion.
For example `/(?<!bar)foo/' matches any
occurrence of "foo" that does not follow "bar".
Works only for fixed-width look-behind.
perl -ne 'print if /(?<!time)\(/' < ippl.log > ippl.noteworthy
Once (shame on you!)
Twice (shame on me!)
More often than I'd like to be
All the time
Just when answering stupid polls
Who you callin' a fool?
I refuse to vote in this ridiculous poll
Results (525 votes). Check out past polls.