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From: Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: Is there any difference between `equal' and `string=' for strings?
Date: Sat, 21 Aug 2021 01:12:05 +0200	[thread overview]
Message-ID: <87lf4v90e2.fsf@zoho.eu> (raw)
In-Reply-To: 87lf4wd3dz.fsf@zoho.eu

>   (defun do-something (method)
>     (when (string= method "now")
>       (message "I'm all over it") ))

What about

(defun get-string (s)
  (if (stringp s)
      s
    (let ((val (symbol-value s)))
      (or (and (stringp val) val)
          (symbol-name s) ))))

(defun string== (s1 s2)
  (string= (get-string s1)
           (get-string s2) ))

(defvar one)
(setq one nil)
(string== "one" "one") ; t
(string== 'one  "one") ; t

(defvar two)
(setq two "one")
(string== 'two  "one") ; t
(string== two   "one") ; t, confusing

(setq one "two")
(string== one "one") ; nil
; argh ...

-- 
underground experts united
https://dataswamp.org/~incal




  reply	other threads:[~2021-08-20 23:12 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-19  4:56 Is there any difference between `equal' and `string=' for strings? Marcin Borkowski
2021-08-19  6:21 ` Jean Louis
2021-08-19 23:14   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20  5:35     ` Jean Louis
2021-08-20  6:32       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  9:05         ` Jean Louis
2021-08-21 19:14           ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-19 15:35 ` [External] : " Drew Adams
2021-08-21  3:43   ` this is United States calling (was: Re: [External] : Is there any difference between `equal' and `string=' for strings?) Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  3:49     ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  4:20       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  5:39     ` FW: " Drew Adams
2021-08-21 19:41       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  6:50     ` tomas
2021-08-21 19:41       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-19 23:02 ` Is there any difference between `equal' and `string=' for strings? Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20  5:25   ` Jean Louis
2021-08-20  6:24     ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20  6:41       ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-20 23:12         ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
2021-08-20 23:42           ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  0:08             ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  0:30               ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  9:08         ` Jean Louis
2021-08-21 19:17           ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-21  9:04       ` Jean Louis
2021-08-21 19:09         ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-08-24 14:55     ` Marcin Borkowski

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