@a puts $s1 =~ /(\d{2})/g in list context so all matches will be found and used to populate @a. You probably want something like:

#!/usr/bin/perl
use warnings;
use strict;

my $s1 = "45 20 00 00 00 03 00";
my $s2 = "40 20 00 00 00 00 00";
my @a1 = $s1 =~ /(\d{2})/g;
my @a2 = $s2 =~ /(\d{2})/g;

die "Mismatched lists" if @a1 != @a2;
print "found $a1[$_] and $a2[$_]\n" for 0 .. $#a1;

[download]

Prints:

found 45 and 40
found 20 and 20
found 00 and 00
found 00 and 00
found 00 and 00
found 03 and 00
found 00 and 00

[download]
True laziness is hard work

In reply to Re: Two Regex Searches Simultaneously (on One Line) by GrandFather
in thread Two Regex Searches Simultaneously (on One Line) by SomeNetworkGuy

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.