Function findLast

Finds the last element in the source array that satisfies the provided predicate function.

Returns undefined if no element satisfies the predicate.

Example

const findLastPositive = findLast((x: number) => x > 0);
const a = findLastPositive([1, 2, 3]); // 3
const b = findLastPositive([-1, 0, -2]); // undefined
  • findLast<Item>(
        predicate: (item: Item) => boolean,
    ): (source: readonly Item[]) => undefined | Item

    Type Parameters

    • Item

    Parameters

    • predicate: (item: Item) => boolean

    Returns (source: readonly Item[]) => undefined | Item