Re: interactive argument not meeting condition

[Joel Reicher]

Heime via Users list for the GNU Emacs text editor 
<help-gnu-emacs@gnu.org> writes:

> For the line column I test whether actm disables the value. 
> What happens to line-column when the condition does not invoke 
> read-number?  Would I need some default for it?
>
> (defun polaq (actm line-column)
>
>   (interactive
>     (let* ( (cseq '("extended" "disable" "tabtrail"))
>             (actm (completing-read "Dragovis: " cseq nil t 
>             "tabtrail"))
>             (line-column (if (not (string= actm "disable"))
>                                (read-number "Set line column: " 
>                                72))) )
>
>       (list actm line-column)) )

It looks like line-column is being set to the result of the "if".

Regards,

       - Joel