Hi,

I wasn’t aware of nor, nand, nond. Maybe there should have been a few more “See 
also” in the docs.

/Jon

> On 7. Feb, 2017, at 08:31, Alexander Burger <a...@software-lab.de> wrote:
> 
> On Tue, Feb 07, 2017 at 08:13:06AM +0100, Alexander Burger wrote:
>> Better to use (not Lst).
> 
> One more note: I even try to avoid 'not' whenever possible, as it is an
> additional function call overhead.
> 
> It is often possible to use the complementary flow function,
> like (ifn Lst ..) instead of (if (not Lst) ..).
> 
>   if    <->   ifn
>   and   <->   nor
>   or    <->   nand
>   when  <->   unless
>   cond  <->   nond
>   while <->   until
> 
> ♪♫ Alex
> -- 

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