The-k-weakest-rows-in-a-matrix [https://leetcode.com/problems/the-k-weakest-rows-in-a-matrix]

the_k_weakest_rows_in_a_matrix.js

var kWeakestRows = function(mat, k) {
    const soldierList = [];

    for(let i = 0; i < mat.length; i++) {
        let soldiers = 0;
        for (j = 0; j < mat[i].length; j++) {
            if (mat[i][j]) {
                soldiers++;
            }
        }

        soldierList.push({
            index: i,
            soldiers
        });
    }

    soldierList.sort((a, b) => {          
        if (a.soldiers === b.soldiers) {
            return a.index - b.index;
        }

        return a.soldiers > b.soldiers ? 1 : -1;
    });

    const result = [];

    for (let i = 0; i < k; i++) {
        result.push(soldierList[i]['index']);
    }

    return result;
};