Function isOkV1

__tests__/List.ts:753–758

(v: number)

    // execute the same test as `v` but for the 2000 first integers
    const isOkV1 = (v: number): boolean =>
      List.of()
        .set(v, v)
        .push('pushed-value')
        .insert(33, 'inserted-value')
        .filter((item) => item === v).size === 1;

    const arr = new Array(2000).fill(null).map((_, v) => v);