프로그래머스 - 행렬의덧셈

const getSumOfArr = (arr1, arr2) => {
    const answer = [];
    for (let i in arr1) {
        let hap = [];
        for (let j in arr1[i]) {
            hap.push(arr1[i][j] + arr2[i][j]);
        }
        answer.push(hap);
        hap = [];
    }
    return answer;
};

test("행렬의 덧셈", () => {
    expect(
        getSumOfArr(
            [
                [1, 2],
                [2, 3]
            ],
            [
                [3, 4],
                [5, 6]
            ]
        )
    ).toEqual([
        [4, 6],
        [7, 9]
    ]);
});