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From: Teemu Likonen <tlikonen@iki.fi>
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Subject: Re: String replace with lisp code
Date: Mon, 18 Jul 2011 09:14:53 +0300
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To: "C. K. Kashyap" <ckkashyap@gmail.com>
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* 2011-07-18T11:06:53+05:30 * C. K. Kashyap wrote:

> During search/replace, how can I use the evaluation of a lisp
> expression as the substitution string?

Let's read this part of the reference manual:

    C-h r m Regexp Replace RET

> (while I was typing this, I got the idea of using the keyboard macro
> to achieve this .... is there a better way though?)

I think this is a good option.