GrandFather is spot-on!

To steal a sheet from a talk I did many years ago:

use Data::Peek;

foreach my $b (qw{ i I s S l L j J n N v V q Q }) {
    foreach my $e ("", "!", "<", ">") {
        $e =~ m{[<>]} && $b =~ m/[cCnNvV]/ and next;
        $e =~ m{[!]}  && $b =~ m/[jJqQ]/   and next;
        my $f = "$b$e";
        print STDERR "$f\t";
        DHexDump pack $f => 0x1234567;
        }
    }

[download]

==>

    i686  Core(TM) i7-2620M   x86_64   Xeon(R) E5320    ia64   Itanium
+ 2
=== ========================  ========================  ==============
+==========
i   67 45 23 01               67 45 23 01               01 23 45 67
i!  67 45 23 01               67 45 23 01               01 23 45 67
i<  67 45 23 01               67 45 23 01               67 45 23 01
i>  01 23 45 67               01 23 45 67               01 23 45 67
I   67 45 23 01               67 45 23 01               01 23 45 67
I!  67 45 23 01               67 45 23 01               01 23 45 67
I<  67 45 23 01               67 45 23 01               67 45 23 01
I>  01 23 45 67               01 23 45 67               01 23 45 67
s   67 45                     67 45                     45 67
s!  67 45                     67 45                     45 67
s<  67 45                     67 45                     67 45
s>  45 67                     45 67                     45 67
S   67 45                     67 45                     45 67
S!  67 45                     67 45                     45 67
S<  67 45                     67 45                     67 45
S>  45 67                     45 67                     45 67
l   67 45 23 01               67 45 23 01               01 23 45 67
l!  67 45 23 01               67 45 23 01 00 00 00 00   00 00 00 00 01
+ 23 45 67
l<  67 45 23 01               67 45 23 01               67 45 23 01
l>  01 23 45 67               01 23 45 67               01 23 45 67
L   67 45 23 01               67 45 23 01               01 23 45 67
L!  67 45 23 01               67 45 23 01 00 00 00 00   00 00 00 00 01
+ 23 45 67
L<  67 45 23 01               67 45 23 01               67 45 23 01
L>  01 23 45 67               01 23 45 67               01 23 45 67
j   67 45 23 01 00 00 00 00   67 45 23 01 00 00 00 00   00 00 00 00 01
+ 23 45 67
j<  67 45 23 01 00 00 00 00   67 45 23 01 00 00 00 00   67 45 23 01 00
+ 00 00 00
j>  00 00 00 00 01 23 45 67   00 00 00 00 01 23 45 67   00 00 00 00 01
+ 23 45 67
J   67 45 23 01 00 00 00 00   67 45 23 01 00 00 00 00   00 00 00 00 01
+ 23 45 67
J<  67 45 23 01 00 00 00 00   67 45 23 01 00 00 00 00   67 45 23 01 00
+ 00 00 00
J>  00 00 00 00 01 23 45 67   00 00 00 00 01 23 45 67   00 00 00 00 01
+ 23 45 67
n   45 67                     45 67                     45 67
n!  45 67                     45 67                     45 67
N   01 23 45 67               01 23 45 67               01 23 45 67
N!  01 23 45 67               01 23 45 67               01 23 45 67
v   67 45                     67 45                     67 45
v!  67 45                     67 45                     67 45
V   67 45 23 01               67 45 23 01               67 45 23 01
V!  67 45 23 01               67 45 23 01               67 45 23 01
q   67 45 23 01 00 00 00 00   67 45 23 01 00 00 00 00   00 00 00 00 01
+ 23 45 67
q<  67 45 23 01 00 00 00 00   67 45 23 01 00 00 00 00   67 45 23 01 00
+ 00 00 00
q>  00 00 00 00 01 23 45 67   00 00 00 00 01 23 45 67   00 00 00 00 01
+ 23 45 67
Q   67 45 23 01 00 00 00 00   67 45 23 01 00 00 00 00   00 00 00 00 01
+ 23 45 67
Q<  67 45 23 01 00 00 00 00   67 45 23 01 00 00 00 00   67 45 23 01 00
+ 00 00 00
Q>  00 00 00 00 01 23 45 67   00 00 00 00 01 23 45 67   00 00 00 00 01
+ 23 45 67

[download]

Enjoy, Have FUN! H.Merijn

In reply to Re: Comparing packed variables by Tux
in thread Comparing packed variables by Jaap

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