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From: Mathias Dahl <brakjoller@gmail.com>
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Subject: Re: email extraction in emacs
Date: Fri, 01 Dec 2006 13:20:20 +0100
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"B. T. Raven" <ecinmn@alcisp.com> writes:

>> (defun blah ()
>>  (let (adresses)
>>   (while (search-forward-regexp "\\(REGEXP-MATCHING-EMAILS\\)" nil t)
>>    (setq addresses (append adresses (list (match-string 1)))))
>>   adresses)
>>

> This sort of works interactively, that is it finds most of them. Blah is
> missing a final parenthesis and I don't understand if addresses with 2 d's
> is outside the scope of the let or not. Anyway, it just returns a list of
> nils even if some email addresses are below the point of invocation in
> *scratch.

Yes, there were typos in the code. There should be only one variable,
`addresses'.

> \b[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]\{2,4\}\b
>
> Maybe all of the backslashes have to be doubled.

If they are in a string, yes.