comefrom: <awangdev>200. Number of Islands_2.java
code: private int countIsland(char[][] grid) {
  
          int m = grid.length, n = grid[0].length;
          int count = 0;
          for (int i = 0; i < m; i++) {
              for (int j = 0; j < n; j++) {
                  count += grid[i][j] == '1' ? 1 : 0;
              }    
          }
          return count;
      }
masked: private int sample_funcname ( char [ ] [ ] var_0 ) {
    int var_1 = var_0 . length , var_2 = var_0 [ 0 ] . length ;
    int var_3 = 0 ;
    for ( int var_4 = 0 ;
    var_4 < var_1 ;
    var_4 ++ ) {
      for ( int var_5 = 0 ;
      var_5 < var_2 ;
      var_5 ++ ) {
        var_3 += var_0 [ var_4 ] [ var_5 ] == '1' ? 1 : 0 ;
      }
    }
    return var_3 ;
  }
  