The following code is untested, but probably has a 90-95% chance of working. 
#!/usr/bin/perl

use warnings;
use strict;

open(LOG, "source.txt") or die "Error: $!";
my @lines = <LOG>;
close(LOG);

my $cnt = 0;
foreach my $line (@lines)
{
  $cnt++;
  $line =~ m/(\d+\s+)(.+)/;

  $lines[$cnt] = "$1 (Birthday) $2 - singer";

  
}

open(LOG, "> source2.txt") or die "Error $!";
print LOG join("\n", @lines);
close(LOG);

[download]


"Age is nothing more than an inaccurate number bestowed upon us at birth as just another means for others to judge and classify us"

sulfericacid

In reply to Re: small regex help by sulfericacid
in thread small regex help by Anonymous Monk

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.