Re^2: Tri state string compare? (Solved! see update2)

There's something missing in that solution, or I don't understand it

Does the fact that I know all my strings will be equal length explain things?

Here's my test code:

#! perl -slw
use strict;

my $pat = 'AAAAAAABCCCCCCCCABAAAAAAA';

my @set = (
    'AAAAAAABAAABABBBABAAAAAAA',
    'AAAAAAABAAABBABBABAAAAAAA',
    'AAAAAAABAAABBBABABAAAAAAA',
    'AAAAAAABBAAABABBABAAAAAAA',
    'AAAAAAABBAAABBABABAAAAAAA',
    'AAAAAAABBBAAABABABAAAAAAA',
    'ABAAAAABAAABABBBABAAAAAAA',
    'AAAAAAAAAAABBABBABAAAAAAA',
    'AAAAAAABAAABBBABAABAAAAAA',
    'AAAAAAABBAAABABBABAAAAAAA',
    'AAAAABABBAAABBABAAAAAAAAA',
    'AAAAAAABBBAAABABAAAAAAAAA',
);

for my $test ( @set ) {
    printf "$pat\n$test\n%s %s\n\n", $pat & $test, ( $pat & $test ) eq
+ $test ? 'OK' : 'NO';
}

__END__
C:\test>junk77
AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABAAABABBBABAAAAAAA
AAAAAAABAAABABBBABAAAAAAA OK

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABAAABBABBABAAAAAAA
AAAAAAABAAABBABBABAAAAAAA OK

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABAAABBBABABAAAAAAA
AAAAAAABAAABBBABABAAAAAAA OK

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABBAAABABBABAAAAAAA
AAAAAAABBAAABABBABAAAAAAA OK

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABBAAABBABABAAAAAAA
AAAAAAABBAAABBABABAAAAAAA OK

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABBBAAABABABAAAAAAA
AAAAAAABBBAAABABABAAAAAAA OK

AAAAAAABCCCCCCCCABAAAAAAA
ABAAAAABAAABABBBABAAAAAAA
A@AAAAABAAABABBBABAAAAAAA NO

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAAAAAABBABBABAAAAAAA
AAAAAAA@AAABBABBABAAAAAAA NO

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABAAABBBABAABAAAAAA
AAAAAAABAAABBBABA@@AAAAAA NO

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABBAAABABBABAAAAAAA
AAAAAAABBAAABABBABAAAAAAA OK

AAAAAAABCCCCCCCCABAAAAAAA
AAAAABABBAAABBABAAAAAAAAA
AAAAA@ABBAAABBABA@AAAAAAA NO

AAAAAAABCCCCCCCCABAAAAAAA
AAAAAAABBBAAABABAAAAAAAAA
AAAAAAABBBAAABABA@AAAAAAA NO
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With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority". I knew I was on the right track :)

In the absence of evidence, opinion is indistinguishable from prejudice.

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