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Re: Break from a dolist
From: |
Cecil Westerhof |
Subject: |
Re: Break from a dolist |
Date: |
Sun, 09 Sep 2012 14:49:45 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) |
Op zondag 9 sep 2012 11:25 CEST schreef Jambunathan K.:
>> I have the following code to fetch the email address belonging to a
>> mailing list. I use it to automatically fill the to address when
>> posting to a newsgroup.
>>
>> (defun dcbl-gnus-get-mailing-list-address ()
>> "Get gnus-newsgroup-name mailing list address (if it has one);"
>> (let ((to-address nil))
>> (when gnus-newsgroup-name
>> (dolist (item dcbl-gnus-mailing-lists)
>> (when (string-match (car item) gnus-newsgroup-name)
>> (setq to-address (cdr item)))))
>> to-address))
>>
>> But when the address is found, it would be better to leave the loop.
>> Is this possible?
>
>
> (info "(elisp) Examples of Catch")
Thanks. That makes for better code. I now have the following code,
that I am going to call from dcbl-gnus-get-mailing-list-address. Much
more clear code and I have now a generic function that I can call from
other places also.
(defun dcbl-get-tuple-value (tuple index)
"Get value from tuple indexed by index (if it exist);"
(when index
(catch 'loop
(dolist (item tuple)
(when (string-match (car item) index)
(throw 'loop (cdr item)))))))
The proof is in:
(dcbl-get-tuple-value dcbl-gnus-mailing-lists
"nnimap+gmail:INBOX\\.Info\\.bbdb")
and that does what it should.
There is one problem. First my 'tuple' was like:
(setq dcbl-gnus-mailing-lists '(
(":INBOX\\.Info\\.bbdb$" .
"bbdb-info@lists.sourceforge.net")
.
.
.
(":bedrijf/organisatie/org-mode$" .
"emacs-orgmode@gnu.org")
))
But now it is like:
(setq dcbl-gnus-mailing-lists '(
(":INBOX\\\\.Info\\\\.bbdb$" .
"bbdb-info@lists.sourceforge.net")
.
.
.
(":bedrijf/organisatie/org-mode$" .
"emacs-orgmode@gnu.org")
))
The backslashes for escaping the . have gone from two to four. Why is this?
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof