Hello Monks,

This is my first post, and I was delighted to find this thread, as it almost exactly addresses what I want to do, with the exception that I would like to narrow the numbers down even further in comparison to the OP's spec.

Thus, I want to take 0000 to 9999 and select only those that have one pair of duplicate digits.

For example:

I am a noob, and this has turned out to be a bit beyond my skill level at this time . . . I was going the grep + regex on Bash route, however, upon seeing the Perl solutions in this thread, I believe I will only use bash to admin my system on the command line from now on :)

In reply to Re: Find duplicate digits by mroman
in thread Find duplicate digits by Anonymous Monk

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