reg reggular expressions

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

Hi all,
I have a file with multipe patterns which are repeated. i want to find the occurance of each pattern (the name) and the no of times it is occured, using regular expressions. can any one help me out thank u

Comment on reg reggular expressions

Replies are listed 'Best First'.
Re: reg reggular expressions by kielstirling (Scribe) on Feb 09, 2012 at 06:41 UTC
Hi, This is a very vague question. Supply more details and some example code and I'll try to help you.	[reply]
Re^2: reg reggular expressions by Anonymous Monk on Feb 09, 2012 at 06:52 UTC
if the file is like this.. mmu-miR-16-1-3p 8 mmu-miR-1-1-3p 8 mmu-miR-500 mmu-miR-16-1-3p 8 i need to identify how many individal patterns are available; how many repeats are there for each individual. thank you	[reply]
Re^3: reg reggular expressions by kielstirling (Scribe) on Feb 09, 2012 at 07:12 UTC
Hi, I would use a hash.. `#!/usr/bin/perl -w use strict; my @files = ( "mmu-miR-16-1-3p 8", "mmu-miR-1-1-3p 8", "mmu-miR-500", "mmu-miR-16-1-3p 8" ); my %pattern_count; map $pattern_count{$_}++, @files; print "filename $_ patten count $pattern_count{$_}\n" for keys %pattern_count;` [download]	[reply] [d/l]
Re^4: reg reggular expressions by Anonymous Monk on Feb 09, 2012 at 07:37 UTC