Idempotent partition around median of 5?

[Andrei Alexandrescu via Digitalmars-d]

On 02/05/2016 07:59 PM, Andrei Alexandrescu wrote:
> On 02/05/2016 06:36 AM, Ivan Kazmenko wrote:
>> Another interesting task would be to make the function stable, but I
>> don't see how it is possible with such flat structure.
>
> Under what circumstances isn't your function unstable? -- Andrei

I meant "is your function unstable". Double negation, but if you speak 
Russian those count as one :o). -- Andrei