Try this 
use strict;

my $a="123-135, 1-119, 1270-1280, 1420-1452";
print "Original : $a\n";

my @a = split (/\, /, $a);
eval{s/^([0-9]*)([0-9]+)\-([0-9]*)([0-9]+)$/&digit($1,$2,$3,$4)/egsi;}
+ for (@a);

print "Changed  : ";
print "$_\t" for @a;

sub digit{
    my ($f, $f1, $s, $s1)=@_;
my ($fs, $se);
    if($s =~ /([0-9]+)([0-9])/)
   {
        $fs = $1; $se = $2;
   }
    if ($f == $s)
    {
        $s=$s1;
    }
    elsif($f=~/^$fs/)
    {
        $s=$se.$s1;
    }
        
    else{
        $s=~s/\d//; $s.=$s1;
    }        
return qq($f$f1-$s);
}

[download]

In reply to Re: Problem in Number Range by cognizant
in thread Problem in Number Range by Samy_rio

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.