At 10:10 AM 6/7/01 -0700, Paul wrote:
> . matches the r in supernova
> n+ matches one or more n's, so it matches the n in supernova
> . matches the o in supervova
> .? matches one or no characters, so it matches nothing
> (successfully, twice)
> v* matches any number of v's, including zero,
> so it matches the v in supernova
> . matches the a in supernova.
Not that it would be possible to tell the difference in this case without
using -Dr, but I beg to disagree with this analysis, and point out my own
previously posted instead. The key difference is that ? is greedy and
backtracking is involved. Important stuff for a regex user to understand,
though.
--
Peter Scott
Pacific Systems Design Technologies
http://www.perldebugged.com
