copy every n-th item of a list into a new list

Replies to This Discussion

Permalink Reply by Danny Boyes on December 16, 2009 at 7:02am

If you ask, you will probably receive in the next release of GH. However in the meantime, you need to generate a boolean pattern that will cull all the other elements you don't want. See Below:

Permalink Reply by David Rutten on December 16, 2009 at 8:51am

Hi Peter,

I suppose the easiest way is to generate a list of number with the Series component, then use List Item to extract all the items.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by peter on December 16, 2009 at 10:52am

thank you both!
I just thought the item component can only extact ONE item from a list at a time, not multiple. so that works now,

best regards
Peter

Permalink Reply by David Rutten on December 16, 2009 at 11:12am

Well, the very logic of grasshopper means you can always supply multiple inputs and it will give you multiple outputs. This has nothing to do with the ListItem component as such, all components work in the same way. Only a very few components that operate directly on Lists and Trees override this default behaviour.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by peter on December 16, 2009 at 11:02am

danny,

thanks for this. can you discribe how you create the cull pattern with components / post the definition?
thanks,
Peter

Permalink Reply by peter on December 16, 2009 at 11:30am

yes, and I have used that plenty, but for some reason I did not think about it in this way in this instance...