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Re: How to read an integer from the minibuffer
From: |
Emanuel Berg |
Subject: |
Re: How to read an integer from the minibuffer |
Date: |
Tue, 16 Nov 2021 07:03:46 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
tomas wrote:
>> It checks if object is number. That is why it is not usable
>> to check if string is actual number.
>
> D'oh, you are right. That'd been too easy ;-)
>
> It seems you'll have to go with a regexp, then do
> string-to-number.
One can use mine initial suggestion. It is a bit complicated -
not the code, but something about it ...
But the actual cause of the confusion is actually
`string-to-number' and this ambiguity:
(string-to-number "not a number") ; 0
(string-to-number "0") ; 0
So ony should start by having string-to-number return nil,
not 0, when the input doesn't make sense!
(defun read-integer ()
(let ((str)
(str-number)
(n) )
(cl-loop until (progn
(setq str (read-string "integer: "))
(if (string= str "0")
(setq n 0)
(setq str-number (string-to-number str))
(unless (= str-number 0)
(setq n str-number) ))
(integerp n)) )
n) )
;; (read-integer)
--
underground experts united
https://dataswamp.org/~incal
- Re: How to read an integer from the minibuffer, (continued)
- Re: How to read an integer from the minibuffer, Jean Louis, 2021/11/13
- Re: How to read an integer from the minibuffer, tomas, 2021/11/13
- Re: How to read an integer from the minibuffer, Emanuel Berg, 2021/11/16
- Re: How to read an integer from the minibuffer, Jean Louis, 2021/11/13
- Re: How to read an integer from the minibuffer, tomas, 2021/11/13
- Re: How to read an integer from the minibuffer, Jean Louis, 2021/11/13
- Re: How to read an integer from the minibuffer, Emanuel Berg, 2021/11/16
- Re: How to read an integer from the minibuffer,
Emanuel Berg <=
- 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, Emanuel Berg, 2021/11/11
Re: How to read an integer from the minibuffer, Marcin Borkowski, 2021/11/12
- Re: How to read an integer from the minibuffer, Emanuel Berg, 2021/11/16
- Re: How to read an integer from the minibuffer, Yuri Khan, 2021/11/16
- Re: How to read an integer from the minibuffer, Emanuel Berg, 2021/11/16
- Re: How to read an integer from the minibuffer, Yuri Khan, 2021/11/16
- Re: How to read an integer from the minibuffer, Emanuel Berg, 2021/11/16
- Re: How to read an integer from the minibuffer, Yuri Khan, 2021/11/16