From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 30730 invoked from network); 21 Feb 2021 03:25:16 -0000 Received: from mx1.math.uh.edu (129.7.128.32) by inbox.vuxu.org with ESMTPUTF8; 21 Feb 2021 03:25:16 -0000 Received: from lists1.math.uh.edu ([129.7.128.208]) by mx1.math.uh.edu with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lDfMu-003L9o-Dc for ml@inbox.vuxu.org; Sat, 20 Feb 2021 21:25:12 -0600 Received: from localhost ([127.0.0.1] helo=lists.math.uh.edu) by lists1.math.uh.edu with smtp (Exim 4.94) (envelope-from ) id 1lDfMt-00E1ld-Nm for ml@inbox.vuxu.org; Sat, 20 Feb 2021 21:25:11 -0600 Received: from mx2.math.uh.edu ([129.7.128.33]) by lists1.math.uh.edu with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lDfMt-00E1lY-2S for ding@lists.math.uh.edu; Sat, 20 Feb 2021 21:25:11 -0600 Received: from quimby.gnus.org ([95.216.78.240]) by mx2.math.uh.edu with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lDfMr-003EuV-7b for ding@lists.math.uh.edu; Sat, 20 Feb 2021 21:25:10 -0600 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:Mime-Version:References:Message-ID:Date:Subject: From:To:Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=5IHfclBmh9m1dZdGgsgY5/LkWWLiyg1Iwr4YH6HaEzE=; b=UZJpNjy8t6A3MykgLoj1i+A0e3 spyLqlJT6Mk3xQHpeK8O8D0/a6KYXZsvfe1TAQ4Eoe7ZP8SG4zYDZ9HFP8M7LUPVtXwREJXZ1CjQi XPS6+wnscoahlISUK4UMVCgkxGqSjZ7bqOcMmWPTZCs4uzSSHRI8QW3fGylK1AGpCleM=; Received: from ciao.gmane.io ([116.202.254.214]) by quimby.gnus.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lDfMk-0002lk-OS for ding@gnus.org; Sun, 21 Feb 2021 04:25:05 +0100 Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lDfMi-00049L-Qu for ding@gnus.org; Sun, 21 Feb 2021 04:25:00 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: ding@gnus.org To: ding@gnus.org From: Emanuel Berg Subject: Re: how can I convert the To field to CC Date: Sun, 21 Feb 2021 04:24:55 +0100 Message-ID: <87h7m63xx4.fsf@zoho.eu> References: <87k0r3kc70.fsf@mat.ucm.es> <87a6rzmtmw.fsf@zoho.eu> <87blcfghv2.fsf@mat.ucm.es> <87k0r27eao.fsf@zoho.eu> <87ft1qe5qd.fsf@mat.ucm.es> <87mtvye3nn.fsf@dick> <87blce5kub.fsf@zoho.eu> <87ft1qdt91.fsf@dick> Mime-Version: 1.0 Content-Type: text/plain User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cancel-Lock: sha1:W6yIdUCmv/jR9+idfH8EpEyrLlU= Mail-Copies-To: never List-ID: Precedence: bulk dick.r.chiang wrote: > Your or'ing with "" would defeat the purpose of `when-let`. Also, it doesn't help :) But your function still doesn't work on an empty To or Cc what I can see. This works, I tried it on the same data. Maybe there is something built-in that one can replace `message-set-header' with tho... (defun message-set-header (hdr val) (interactive "sheader: \nsvalue: ") (message-position-on-field hdr) (message-beginning-of-header nil) (delete-region (point) (point-at-eol)) (insert val) ) ;; test: ;; (message-set-header "Subject" "Lara loves YOU") (defun message-transpose-headers (hdr1 hdr2) (interactive "sheader 1: \nsheader 2: ") (save-excursion (let ((v1 (or (message-field-value hdr1) "")) (v2 (or (message-field-value hdr2) "")) ) (message-set-header hdr1 v2) (message-set-header hdr2 v1) ))) ;; test: ;; (message-transpose-headers "To" "Subject") -- underground experts united http://user.it.uu.se/~embe8573 https://dataswamp.org/~incal