my $lenSmall = length $smallstring;

for my $o ( 0 .. $lenBig - 1  ) {
    my $masked = substr( $bigstring, $o, $lenSmall ) ^ $smallstring;
    my $matched = $masked =~ tr[\0][];
    if( ( $matched / $lenSmall ) > 0.90 ) {
        $masked =~ tr[\1-\255][ ];
        $masked =~ tr[\0][*];
        printf "%.2f%% match at offset %u\n", $matched / $lenSmall * 1
+00, $o;
        print substr $bigstring, $o, $lenSmall;
        print $smallstring;
        print $masked;
    }
}

[download]
98.05% match at offset 1071
YQVARNDGQGKAAATFMHISYNNFITEVNNLNKRMGDLRDINGEAGTWVRLLNGSGSADGGFTDHYTLLQ
+MGADRKHELGSMDLFTGVMATYTDTDASADLYSGKTKSWGGGFYASGLFRSGAYFDVIAKYIHNENKYD
+LNFAGAGKQNFRSHSLYAGAEVGYRYHLTDTTFVEPQAELVWGRLQGQTFNWNDSGMDVSMRRNSVNPL
+VGRTGVVSGKTFSGKDWSLTARAGLHYEFDLTDSADVHLKDAAGEHQINGRKDSRMLYGVGLNARFGDN
+TRLGLEVERSAFGKYNTDDAINANIRYSF
GTMARNDGQGKAAATFMHISYNNFITEVDNLNKRMGDLRDINGEAGTWVRLLNGSGSADGGFTDHYTLLQ
+MGADRKHELGSMDLFTGVMATYTDTDASADLYSGKTKSWGGGFYASGLFRSGAYFDVIAKYIHNENKYD
+LNFAGAGKQNFRSHSLYAGAEVGYRYHLTDTTFVEPQAELVWGRLQGQTFNWNDSGMDVSMRRNSVNPL
+VGRTGVVSGKTFSGKDWSLTARAGLHYEFDLTDSADVHLKDAAGEHQINGRKDSRMLYGVGLNARFGDN
+TRLGLEVERSAFGKYNTDDAINANIRYSFLE
   ************************* *****************************************
+*********************************************************************
+*********************************************************************
+*********************************************************************
+*****************************

[download]

In reply to Re^2: Tips on how to perform this regex query by Anonymous Monk
in thread Tips on how to perform this regex query by Anonymous Monk

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