Re: Doing things only in a particular mode

[jorge.alfaro-murillo@yale.edu (Jorge A. Alfaro-Murillo)]

Stefan Monnier writes:

>>> Note that I use `-1` as the argument to `visual-line-mode`. 
> 
> I do the same and recommend others do that as well.

I like better:

(foo-mode 1) ; on

(foo-mode 0) ; off

It looks like a on/off switch.

>>> IIRC an argument of 0 would actually activate the mode. 
>> That is wrong, 
> 
> Indeed, it's wrong.  But whether 0 is negative or positive or 
> both or neither is a long discussion, so by using -1 you 
> completely side step the issue.

A positive number is a number bigger than zero. Zero is not bigger 
than zero, so it is not a positive number. It is also not a 
negative number, since it is not smaller than zero.

-- 
Jorge.