From: Jean Louis <bugs@gnu.support>
To: help-gnu-emacs@gnu.org
Subject: Re: How to read an integer from the minibuffer
Date: Fri, 12 Nov 2021 23:02:10 +0300 [thread overview]
Message-ID: <YY7IQj8f24FBtzkm@protected.localdomain> (raw)
In-Reply-To: <87v90x5g7p.fsf@zoho.eu>
Improved check for number:
(defun string-is-number-p (s)
"Return number only if string is actual number, otherwise NIL."
(let* ((s (string-trim s)))
(cond ((seq-empty-p s) nil)
((string-match "[^0123456789\\.-]" s) nil)
((string-match "-" s 1) nil)
((numberp (string-to-number s)) (string-to-number s)))))
(string-is-number-p "-0.1") ⇒ -0.1
(string-is-number-p "0.1") ⇒ 0.1
(string-is-number-p "0.1-") ⇒ nil
(string-is-number-p " 1 ") ⇒ 1
(string-is-number-p " a 1 ") ⇒ nil
--
Jean
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next prev parent reply other threads:[~2021-11-12 20:02 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-11 4:53 How to read an integer from the minibuffer Marcin Borkowski
2021-11-11 5:11 ` Po Lu
2021-11-11 7:18 ` Marcin Borkowski
2021-11-12 7:21 ` Yuri Khan
2021-11-13 6:59 ` Marcin Borkowski
2021-11-13 8:43 ` tomas
2021-11-13 7:33 ` Jean Louis
2021-11-16 6:39 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-16 7:37 ` Yuri Khan
2021-11-16 8:00 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-11 6:27 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-11 10:25 ` Gregory Heytings
2021-11-11 10:28 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-11 11:00 ` Gregory Heytings
2021-11-11 13:20 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-11 11:17 ` Gregory Heytings
2021-11-11 13:39 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-11 14:30 ` Gregory Heytings
2021-11-12 0:28 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 0:37 ` Gregory Heytings
2021-11-12 0:41 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 0:52 ` Gregory Heytings
2021-11-12 0:57 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 19:05 ` Jean Louis
2021-11-12 19:25 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 19:55 ` Jean Louis
2021-11-12 21:14 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-13 6:37 ` Jean Louis
2021-11-16 6:21 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 19:56 ` Jean Louis
2021-11-12 20:02 ` Jean Louis [this message]
2021-11-12 20:24 ` tomas
2021-11-12 21:15 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 21:30 ` tomas
2021-11-12 21:34 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-13 6:46 ` Jean Louis
2021-11-13 7:32 ` tomas
2021-11-16 6:24 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-13 6:36 ` Jean Louis
2021-11-13 8:17 ` tomas
2021-11-13 8:44 ` Jean Louis
2021-11-16 6:15 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-16 6:03 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 1:09 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 1:12 ` Gregory Heytings
2021-11-12 3:07 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-12 6:21 ` Marcin Borkowski
2021-11-16 7:52 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-16 8:05 ` Yuri Khan
2021-11-16 9:38 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-16 11:18 ` Yuri Khan
2021-11-16 11:37 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-16 11:52 ` Yuri Khan
2021-11-16 12:00 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-11-16 13:10 ` Emanuel Berg via Users list for the GNU Emacs text editor
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