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Re: Why is this greedy matching?

by toolic (Bishop)
on Mar 23, 2012 at 14:41 UTC ( [id://961219]=note: print w/replies, xml ) Need Help??


in reply to Why is this greedy matching?

File::Basename is easier:
use warnings; use strict; use File::Basename; my $file = 'http://txs.corp.com:8080/area/es/2215.csv.gz'; my $gzip = basename($file, qr/\.gz/); print "$gzip\n"; __END__ 2215.csv.gz

Demystify regular expressions by installing and using the CPAN module YAPE::Regex::Explain (Tip #9 from Basic debugging checklist)

The regular expression: (?-imsx:/(.*?\.gz)$) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- / '/' ---------------------------------------------------------------------- ( group and capture to \1: ---------------------------------------------------------------------- .*? any character except \n (0 or more times (matching the least amount possible)) ---------------------------------------------------------------------- \. '.' ---------------------------------------------------------------------- gz 'gz' ---------------------------------------------------------------------- ) end of \1 ---------------------------------------------------------------------- $ before an optional \n, and the end of the string ---------------------------------------------------------------------- ) end of grouping ----------------------------------------------------------------------

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