Consider a table containing a column a which is a list of lists as
q) show t: ([] a: ((1;2); (); (); (5;6); (); ()));
a
---
1 2
()
()
5 6
()
()
I'm having trouble filling the empty sublists () with the most recent non-empty list to get the expected output
a
---
1 2
1 2
1 2
5 6
5 6
5 6
I tried
t:update a: 0N from t where 0=count'[a];
t:update a: fills a from t;
but I got
'nyi
[4] t:update a: fills a from t;
You can use a custom fill function and scan in this case. fills does not work well with nested lists.
q)update a:{$[count y;y;x]}\[a] from t
a
---
1 2
1 2
1 2
5 6
5 6
5 6