ludic/docs/language/list/list-clear.md

id	name	category	kind	tokens	sig	tip	order	ns	member
list-clear	List.clear	list	namespace-method	List.clear	List.clear(s) -> void	Remove all elements, keeping capacity.	2	List	clear

Empties s by setting its length back to zero. The backing buffer is kept, so refilling the slice afterward reuses the same memory without reallocating. Use it to reset a per-frame list — collisions, visible tiles, particles to draw — at the start of each update instead of building a new slice every frame.

Parameters:

• s — the slice to empty

program FrameHits {
  state FrameHitsState {
    hits: []int = new []int
  }

  handler BeginFrame(frame_hits_st: FrameHitsState) phase Update {
    List.clear(frame_hits_st.hits)   # start the frame with an empty list
  }
}