function sumOfTwo(nums1, nums2, value) {
    return nums1.map(num1 => {
        let res = false
        nums2.forEach((num2) => (num1 + num2 === value) && (res = true))
        return res
    }).includes(true)
}

//better solution
/*
function sumOfTwo(nums1, nums2, value) {
  return nums1.some(el => nums2.includes(value - el))
}
*/



/**
* Test Suite 
*/
describe('sumOfTwo()', () => {
    it('returns true if a value can be found that by adding one number from each list', () => {
        // arrange
        const nums1 = [1, 2, 3];
        const nums2 = [10, 20, 30, 40];
        const value = 42;
        
        // act
        const result = sumOfTwo(nums1, nums2, value);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(true);
    });
});