Reg exp issue

prafull has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Reg exp issue by roboticus (Chancellor) on Dec 15, 2010 at 13:18 UTC
prafull: What have you tried? What error(s) did you get? ...roboticus When your only tool is a hammer, all problems look like your thumb.	[reply]
Re: Reg exp issue by ww (Archbishop) on Dec 15, 2010 at 13:35 UTC
You want to get "5 ( from 5.I) and 3 from (3.I)" from which 5.I? `$key = qq{'5.I.(f2401)' ? '5.I.(f2401)' : '3.I.(f2400)'};` This one ^ or this one ^ ?	[reply] [d/l]
Re^2: Reg exp issue by prafull (Novice) on Dec 17, 2010 at 05:09 UTC
Thanx a lot everyone for sharing knowledge. ww, I want 5.I from both. Regards Prafull	[reply]
Re: Reg exp issue by Anonymous Monk on Dec 15, 2010 at 13:19 UTC
Write a pattern to match a literal quote character a digit (with quantifier for one or more times) a literal dot a literal I literal dot use capture parens around the digit Tutorials: Pattern Matching, Regular Expressions, and Parsing, perlretut	[reply]
Re^2: Reg exp issue by Anonymous Monk on Dec 15, 2010 at 13:24 UTC
use YAPE::Regex::Explain; print YAPE::Regex::Explain->new( qr/'\.(\d+)\.I\./ )->explain; __END__ The regular expression: (?-imsx:'\.(\d+)\.I\.) 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: ---------------------------------------------------------------------- \d+ digits (0-9) (1 or more times (matching the most amount possible)) ---------------------------------------------------------------------- ) end of \1 ---------------------------------------------------------------------- \. '.' ---------------------------------------------------------------------- I 'I' ---------------------------------------------------------------------- \. '.' ---------------------------------------------------------------------- ) end of grouping ---------------------------------------------------------------------- [download]	[reply] [d/l]