Posts by DGPickett

== is a shallow comparison, like shallow copy, true only if the refrences are identical, not the objects. http://adripofjavascript.com/blog/drips/object-equality-in-javascript.html JAVA and C++ also have this sort of limitation unless you overload the == operator or use a method, like compareTo, equals, and JAVAScript isEqual. JAVA Sets use object.equals(), which is furstrating as you cannot override with your own class.equals().

The hollow diamond is about distance from center column and distance from center row; their sum s/b half the height to print. In this case, 3. So:

for ( int c = 0 ; c < 7 ; c++ ){
  for ( int r = 0 ; r < 7 ; r ++ ){
     If ( r + c == 3  || r - c == -3 || r + c ==  9 || r - c == 3 ){
        cout << ‘*’ ;
      }
    }

     cout << ‘\n’ ;
   }
// r + c goes from upper right to lower left
// r - c  goes from upper left to lower right