[GitHub] [arrow] lidavidm commented on pull request #14395: ARROW-17960: [C++][Python] Implement list_slice kernel

[GitBox <gi...@apache.org>]

lidavidm commented on PR #14395:
URL: https://github.com/apache/arrow/pull/14395#issuecomment-1303332135

   > What do we want to use as the default return type for slicing a variable size list? Return a fixed size list (padding with nulls to get the correct length), or keep a variable size list (not padding with nulls, just slice until the end if stop > size of a list element)
   
   IMO it makes more sense to slice variable sized lists to variable sized lists by default.
   
   > For slicing fixed size list arrays, what do we want to do when slicing until after the end (stop > list size)? Padding with nulls and always return a fixed size list of size stop - start, or slice until the end (Python slice semantics) and return a fixed size list of size min(list_size, stop -start)
   
   I agree with Miles's proposal above. 


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