Re: How to read an integer from the minibuffer

[Emanuel Berg]

Jean Louis wrote:

> I do not see how it helps in my use case as I want to ensure
> that number in the string is actual number and nothing else.

See this function, it is a workaround.

But the problem is that `string-to-number' returns 0 on "0"
(which is good) but also on "not a number". Don't know what
genious came up with that since it is an obvious
collision/ambiguity.

(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)

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