Re: Regex to extract number from text file

Hi,

'\d' is used to match the digits in regular expressions. You can write the regular expression like

 while (<FH>) {
        print "Matched Number:",$1 if(/(\d+)/g);
    }
[download]

you will get the matched number in $1.

Comment on Re: Regex to extract number from text file Download Code

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Re^2: Regex to extract number from text file by GrandFather (Saint) on Feb 18, 2009 at 20:32 UTC
except that you don't want the /g (global) switch on the regex! Consider: `use strict; use warnings; my $str = 'wibble 10'; print "Matched $1\n" if $str =~ /(\d+)/g; print "Matched $1\n" if $str =~ /(\w+)/g;` [download] Prints: `Matched 10` [download] Because of the /g switch the second match fails because is starts searching from where the first match left off. True laziness is hard work	[reply] [d/l] [select]