[PD] Funny things with list split [was: Pd exam 02: complete a longer list]

[Martin Schied]

Thomas Grill wrote:
>
> Am 26.11.2008 um 14:47 schrieb Martin Schied:
>
>> Hey all,
>>
>> I was trying to do this dynamically with the lowest possible amount 
>> of objects and I found a surprising behavior of [list split]:
>>
>> Connecting a patchcord back from the second outlet of [list split] to 
>> its first inlet puts out all elements of a list in reversed order of 
>> the first outlet.
>>
>> I know that's neither effective nor the right way to patch in Pd, but 
>> perhaps someone can explain that?
>
> it's surely a consequence of "depth first" (see pd help examples)... 
> the message output from the second outlet retriggers and alters the 
> state of the "list split" before the message is output from the first 
> outlet. I guess that quite a number of pd objects are not re-entrant 
> (including most of mine).
> gr~~~
>
Yeah, that's a real good example for depth first (and also for recursive 
functions on lists)! If you change the outlets oft the [t a a] also the 
order of the printed list switches from reversed to not reversed. Good 
to know!

cheers,
Martin