Similar to Scrolling List but this datastructure has a list as a focused item. Useful for problems you can solve via Sliding Window Technique.
You can use ya-literal package to define it using literal notation:
[[1,2,3],[4],[5,6,7,8,9]] `yi` is @(Sliding List Integer)
You can merge Shafted List into List, Nonempty List:
[[1],[2,3],[4]] `lu` [5,6,7] `yi` Merge @(Sliding List) @List `ho` to @List
`q___` [1,2,3,4,5,6,7]