The regular expression...

 /ABCD{3}.E/

...matches: ABCDDDJE ABCDDDLE ABCDDD6E ABCDDD?E

How should I write it to match all strings with 2 D letters in the 4th, 5th and 6th position, irrespectively of where they are within this segment

That is, to match: ABC6DDJE ABCD6DJE ABCDD6JE ABCDD6LE ... and so on

Better than brute force approaches, I would appreciate a generic way of writing this regular expression, since I want to apply it to cases with multiple repetitions and with variable length. For instance, regexp like this:

 /D.{3}[A-Z]{3,15}[0-9]{6,8}[^D]{2}/

Thanks a lot in advance, JR

In reply to regexp with mismatches by jrblas

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