ok I wrote a perl script that parses our credit card files. In a nutshell it:
1. Reads a directory listing and pushing all files into the array @dirlisting
2. go through foreach(@dirlisting) opens the file and substr it getting the data I want out of it and writing it to a new file. Removing any dupes if the dupes are in a certain field:
$lines{$ccn}++;        
if($lines{$ccn} == 2){ 
push @dupes, $ccn;

[download]

3. Then we take out dupes array and write that to a dupes file and if they're not dupes:
 if (!$dupez{$ccn}){
then we write to a newmaster.txt file.

Now everything seems to work ok but it was just reported to me that one of the credit card numbers in the original file was reversed! ie.

Original File:
firstnumber
secondnumber

After PerlScript:
secondnumber
firstnumber


Now the reason this is a problem is cause we substr the entire line so the other fields that corresponde with those numbers were not switch! so I have mismatched number. Any ideas as to why this might happen?
Thanks for any help

Edit kudra, 2002-02-23 Added description to title

In reply to funny results: unexpected order reversal by jspindler

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