Type Alias FindLast<A, Criteria>

FindLast: IsTuple<
    A,
    {
        $else: A extends Readonly<(infer T)[]>
            ? T extends Criteria ? T | undefined : never
            : never;
        $then: A["length"] extends 0
            ? never
            : A extends readonly [...(infer Heads), infer Last]
                ? Last extends Criteria ? Last : FindLast<Heads, Criteria>
                : never;
    },
>

🦴 utilities

Gets the last type in the array or tuple that matches the Criteria.

If the Criteria is not met, it will return `never'.

For Array<T>, it will return T | undefined if T satisfies Criteria.

Type Parameters

  • A extends readonly unknown[]
  • Criteria

Example

ArrayPlus.Find<Array<1 | 2 | 'x'>, number> // 1 | 2 | undefined

ArrayPlus.Find<[true, 123, 'x', 321], number> // 321

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