Настроение:	accomplished
Entry tags:	computing

Moving the terrain arrays to ECS...
Beside efficient bitmaps, implementing world map cells as entities requires a way to allocate entity ids at a specific continuous range and to reserve that range in advance. But a continuous range of memory addresses is usually called "array"! In our case sparse columnar array, which itself can be implemented using `cls` (columnar struct classifier macro):

//array of columnar objects
cls cla n: = newIds_ $n
@as_text = "$<cla:[$id]:[$n]>"
@'.' K = (fxn $id + 1 + K).as_id.trycls