From: Richard Conroy <richard.conroy@...>
Date: 2010-11-03T06:34:08+09:00
Subject: Re: Regular Expression

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On Tue, Nov 2, 2010 at 9:05 PM, Dv Dasari <dv.mymail@gmail.com> wrote:

> I am trying to write a reqular expression to match a word with my input
> string.
>
> Input string can be ( inpstr = ABCDD )
>
> Any suggestion on how I can fix this?
>

You are going to need some more advanced regexes to get a match in the way
you are hoping for.

I would get out a copy of a good regex cheat sheet, and work through some
examples in http://rubular.com
http://www.addedbytes.com/download/regular-expressions-cheat-sheet-v2/pdf/

The main reason for rubular is that you list all of the regexes you want to
match, and which to reject, and keep tweaking until you get what you want.

OTOH this regex might scratch your itch:
/^A?B?C?D{0,2}$/



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