[Algorithm] 24 week(6.27 ~ 7.03) 2/3

1337. The K Weakest Rows in a Matrix

var kWeakestRows = function(mat, k) {
    const addMat = mat.map((matNumber, index) => {
        let totalNumber = matNumber.reduce((acc, curr) => acc + curr, 0);
        return [index, totalNumber];
    })
    
    addMat.sort((a, b) => Number(a[1]) - Number(b[1]));
    
    return addMat.slice(0, k).map((arr) => arr[0]);
};