Function setFirstRowZero

javascript/0073-set-matrix-zeroes.js:165–170

(matrix, cols = matrix[0].length)

};

var setFirstRowZero = (matrix, cols = matrix[0].length) => {
    for (let col = 0; col < cols; col++) {
        /* Time O(COLS) */
        matrix[0][col] = 0;
    }
};

var setFirstColZero = (matrix, rows = matrix.length) => {
    for (let row = 0; row < rows; row++) {