span

span<T, R>(xs, predicate): [T[], IteratorObject<T, R>]

Returns a tuple where first element is longest prefix of xs of elements that satisfy the predicate and second element is the remainder of the Iterable.

Example

const [init, rest] = span([1, 2, 3, 4], (x) => x < 3)
init
// => [1, 2]

collect(rest)
// => [3, 4]

Type Parameters

• T

The element type.

• R

The return type.

Parameters

xs

Iterable<T, R>

The values to span.

predicate

(x) => boolean

The predicate to split the Iterable on.

Returns

[T[], IteratorObject<T, R>]

A tuple.