From: Kevin Rodgers <ihs_4664@yahoo.com>
Subject: Re: newbie : elisp - prompt for input
Date: Tue, 29 Aug 2006 13:53:21 -0600 [thread overview]
Message-ID: <ed2613$fhp$2@sea.gmane.org> (raw)
In-Reply-To: <85hczwtuxl.fsf@lola.goethe.zz>
David Kastrup wrote:
> Kevin Rodgers <ihs_4664@yahoo.com> writes:
>
>> Hadron Quark wrote:
>>> Is the snippet below the best way to prompt and parse an integer value?
>>>
>>>
>>> (defun count-words(max)
>>> "count words in buffer"
>>> (interactive "nMax words to count to:")
>>> (while (zerop max)
>>> (setq max (string-to-number(read-string "> 0 please. re-enter:"))))
>> The only thing I see wrong with it is that the check runs outside
>> of the interactive form, and prompts the user (regardless of whether
>> the function was called interactively).
>
> It will also permit entering negative numbers.
If Hadron upgrades to Emacs 22, s/he can use read-number instead of
(string-to-number (read-string ...))
--
Kevin
prev parent reply other threads:[~2006-08-29 19:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-28 19:17 newbie : elisp - prompt for input Hadron Quark
2006-08-28 21:07 ` Kevin Rodgers
[not found] ` <mailman.5849.1156799345.9609.help-gnu-emacs@gnu.org>
2006-08-28 21:15 ` Hadron Quark
2006-08-29 19:51 ` Kevin Rodgers
2006-08-28 21:24 ` David Kastrup
2006-08-29 19:53 ` Kevin Rodgers [this message]
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