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Re^5: regex at word boundaryby QM (Parson) |
on Dec 08, 2005 at 05:12 UTC ( [id://515133]=note: print w/replies, xml ) | Need Help?? |
"must not match nothing"I understand that at some level, but my brain is yelling "double negative!!". It might be better to say: (?!) is the negative look-ahead assertion for the null string. Since the null string matches anything and everything (including nothing), (?!) always fails.[I was tempted to find a symbolic representation for the null string, but I thougt that would only confuse the issue.] -QM
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