Find Number of Joins in an Array

Given a 2D array arr, define two types of joins: 1. Rows and columns are completely identical; 2. All but the intersection are identical. Find the total number of joins in the array. Example: arr = [[1, 1, 1, 1], [1, 1, 1, 0], [2, 1, 3, 1]] Output: 2 Explanation: The first row and the second column form a join (case1), and the second row and the fourth column form another join (case2). Example Input arr = [[1, 1, 1, 1], [1, 1, 1, 0], [2, 1, 3, 1]]