take

In std/collections.

fn take<S : Seq<T>, T>(self: S, n: Int) : S
fn take<T>(self: Stream<T>, n: Int) : List<T>
fn take<T : Orderable>(self: Collection<T>, n: Int) : List<T>

The first n elements. A prefix of a sequence keeps its positions and its type: [5, 3, 4] | take(2) is [5, 3]. A prefix of a stream is a finite List; a prefix of any other collection is taken in its elements' order: Set([5, 3, 4]) | take(2) is [3, 4]. A negative n is an evaluation error.