Your code looks like this:

#!/usr/bin/perl -wl

use strict;

my $str_a = "
      0000              0000        
     000000            000000       
     000000            000000       
      0000              0000        
                                    
   0000000000          000000       
  000000000000        00000000      
  00 000000 00       00  00  00     
  00 000000 00      00  0000  00    
  00 000000 00     00  000000  00   
  00 000000 00    00  00000000  00  
     000000          0000000000     
     000000         000000000000    
     00  00        00000000000000   
     00  00            00  00       
     00  00            00  00       
     00  00            00  00       
     00  00            00  00       
     00  00            00  00       
";

my $str_b = '02e05f08f08e0b401709e0cb0980cd0f9115'.
            '13412d13c0620680b406c07301500d013006';

my ( $a, $t, @a, @b );

$str_a .= " \n" x 4;

@b = ( $str_b =~ m/.../g ); # Nice

foreach my $line ( split /\n/, $str_a ) {
    $a = -5;
    $t = 0;
    foreach my $char ( split //, $line ) {
        $t += $a if $char =~ /0/;
        $a++;
    }
    push @a, $t;
}
print grep{$_ = chr( $_ + 120 - hex shift @b )}@a;
[download]

You are creating two arrays of 24 elements, one for each character of "Just another Perl hacker".

The elements in the @a array are based on the total number of 0's in each line of the image (including 4 additional semi-blank lines).

The elements in the @b array are hexidecimal numbers split out of the $$ string. These arrays act like masks which you add together to generate the JAPH.


John.
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