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Re: How to read an integer from the minibuffer
From: |
Yuri Khan |
Subject: |
Re: How to read an integer from the minibuffer |
Date: |
Tue, 16 Nov 2021 14:37:29 +0700 |
On Tue, 16 Nov 2021 at 13:41, Emanuel Berg via Users list for the GNU
Emacs text editor <help-gnu-emacs@gnu.org> wrote:
> (defun string-to-number-number (str)
> (if (string= str "0")
> 0
> (let ((num (string-to-number str)))
> (unless (zerop num)
> num) )))
> ;; (string-to-number-number "10")
> ;; (string-to-number-number "1.5")
> ;; (string-to-number-number "0")
> ;; (string-to-number-number "-1.5")
> ;; (string-to-number-number "-10")
> ;; (string-to-number-number "not a number") ; nil
‘string-to-number’ has one more deficiency — it ignores additional
non-digit characters.
M-: (string-to-number "123foo")
⇒ 123 (#o173, #x7b, ?\{)
You cannot build anything strict on such a lax parser.
Re: How to read an integer from the minibuffer, Emanuel Berg, 2021/11/11
Re: How to read an integer from the minibuffer, Gregory Heytings, 2021/11/11
Re: How to read an integer from the minibuffer, Gregory Heytings, 2021/11/11