in reply to Re: Comapring two values of a scalar
in thread Comapring two values of a scalar

Uner the same assumption, I prefer a regular expression. The Common module will match any valid number. The /e option will do the subtraction. The /r option returns the result without modifying the original string. 

use strict;
use warnings;
use Regexp::Common;
my $NUMBER = qr/$RE{num}{real}/;
my @array = ('31:15');
print $array[0] =~ s/($NUMBER):($NUMBER)/$1-$2/er;

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Bill

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Re^3: Comapring two values of a scalar
by igelkott (Priest) on Apr 13, 2013 at 22:50 UTC
    Regexp::Common

    While nice and general, this seems a bit heavy for the OP, especially considering the the rather regular examples given. Of course, always nice to see an example of a more general/powerful solution.

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