top_k

In std/collections.

reduction fn top_k<T : Orderable>(self: Collection<T>, k: Int) : List<T>
reduction fn top_k<T, K : Orderable>(self: Collection<T>, k: Int, by: T -> K) : List<T>

The k greatest occurrences, by value order or by the key by gives, greatest first, equal keys in input order: [3, 1, 4, 1, 5] | top_k(2) is [5, 4].