Equal Row and Column Pairs LeetCode solution in JavaScript

1
var equalPairs = function (grid) {
2
  let n = grid.length;
3
  let count = 0;
4

5
  let map = new Map();
6

7
  //making rowArray
8
  for (let row = 0; row < n; row++) {
9
    let temp = [];
10
    for (let col = 0; col < n; col++) {
11
      temp.push(grid[row][col]);
12
    }
13

14
    temp = temp.join();
15

16
    if (map.has(temp)) {
17
      let tempCount = map.get(temp);
18
      map.set(temp, tempCount + 1);
19
    } else {
20
      map.set(temp, 1);
21
    }
22
  }
23

24
  for (let col = 0; col < n; col++) {
25
    let temp = [];
26
    for (let row = 0; row < n; row++) {
27
      temp.push(grid[row][col]);
28
    }
29

30
    temp = temp.join();
31

32
    if (map.has(temp)) {
33
      count += map.get(temp);
34
    }
35
  }
36

37
  return count;
38
};