Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

Re: Extracting Strings - Special Cases

by Athanasius (Chancellor)
on Jan 07, 2013 at 13:35 UTC ( #1012032=note: print w/replies, xml ) Need Help??

in reply to Extracting Strings - Special Cases

Hello rajkk04, and welcome to the Monastery!

i want to extract only 4 letters (alphanumeric) in the complete text.

Assuming this means: Match the first alphanumeric word of exactly 4 characters appearing between double quotes:

#! perl use strict; use warnings; my $s = '"perl"monks'; $s =~ m{ " (\w{4}) " }x; print $1, "\n" if $1;


23:31 >perl perl 23:31 >

See “Quantifiers” under perlre#Regular-Expressions.

Update: If you need to match strictly alphanumeric characters only (no punctuation characters), change \w in the regex to [A-Za-z0-9].

Hope that helps,

Athanasius <°(((><contra mundum Iustus alius egestas vitae, eros Piratica,

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1012032]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others cooling their heels in the Monastery: (5)
As of 2016-10-22 10:24 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (294 votes). Check out past polls.