having spaces instead of underscores: 

#!/usr/bin/perl -wl
use strict;

sub is_compatible {
    local $_ = $_[0] ^ $_[1];
    return  not (/[\001-\017]/ or /([\020-\031]).*?\1/s);
}

print is_compatible (' 8  3  19',
                     '48    7  ') ? 'yes' : 'no';


print is_compatible (' 8  3  19',
                     '4 8   7  ') ? 'yes' : 'no';


print is_compatible (' 8  3  19',
                     '48     7 ') ? 'yes' : 'no';

__END__
# output
yes
no
no

[download]

In reply to Re: Comparison by position and value by ccn
in thread Comparison by position and value by BrowserUk

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.