JS matrix zero

Given a m x n Matrix , If an element is 0 , Set all elements of the row and column to 0 . Please use In situ Algorithm .

Example 1：

Input ：matrix = [[1,1,1],[1,0,1],[1,1,1]]
Output ：[[1,0,1],[0,0,0],[1,0,1]]

source ： Power button （LeetCode）

/** * @param {number[][]} matrix * @return {void} Do not return anything, modify matrix in-place instead. */
var setZeroes = function(matrix) {
    
    let m = matrix.length
    let  n = matrix[0].length;
    // Declaration line 
    const row = new Array(m).fill(false);
    // Declaration column 
    const col = new Array(n).fill(false);
    for (let i = 0; i < m; i++) {
    
        for (let j = 0; j < n; j++) {
    
            if (matrix[i][j] === 0) {
    
            // Which lines 、 Which columns are 0
                row[i] = col[j] = true;
            }
        }
    }
    for (let i = 0; i < m; i++) {
    
        for (let j = 0; j < n; j++) {
    
            if (row[i] || col[j]) {
    
                matrix[i][j] = 0;
            }
        }
    }
};