[TriLUG] regex: match lines NOT containing X
hunteke at earlham.edu
Wed Feb 22 09:56:07 EST 2012
An actual technical question here: Is there a way to match an entire
line such that the entire line does *not* contain a sequence of characters?
Example input containing three lines:
If two heads are better than one,
are two keyboards better than one?
Would you say the same if it were two hydra heads?
My criteria is very specific: I want lines that do *not* contain
'heads'. My first thought was to use an assertion:
However, this naive implementation matches both lines 2 and 3. I've
needed this construct more than a few times, so I'm almost sure it
exists; I just don't know the right Google terms, apparently. On the
other hand, I could accept that this may not be possible in a single
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