Scan
Generated from the engine's own definition: compute-engine's symbol, which we neither extend nor document by hand. No examples yet — the crosswalk is the reason it has a page.
Return the cumulative fold of a collection: a same-length collection whose k-th element is the running result of applying a binary function left to right (optionally seeded by an initial value).
Scan(collection<T>, reducer: (unknown, T) any -> unknown, initial: value?) -> indexed_collection where Tas compute-engine declares it