every

every() function

Returns true if all of the values in Iterable/AsyncIterable pass the f truth test.

Signature:

declare function every<A extends readonly []>(f: Arrow, iterable: A): true;

declare function every<A, B = unknown>(f: (a: A) => B, iterable: Iterable<A>): boolean;

declare function every<A, B = unknown>(f: (a: A) => B, iterable: AsyncIterable<A>): Promise<boolean>;

declare function every<A extends Iterable<unknown> | AsyncIterable<unknown>, B = unknown>(f: (a: IterableInfer<A>) => B): (a: A) => ReturnValueType<A, boolean>;

Example

every((a) => a % 2 === 0, [2, 4, 6, 8, 10]);
// true

every((a) => a % 2 === 0, [2, 4, 6, 7, 10]);
// false

Try It

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