title: Objective-C 2D arrays
body: <p>In objective C how can I add specific numeric values to an array at given points (for example row3 column6) And how can I then also retrieve that value to compare it to another array at that same given point? When I try using examples I found online I get memory leaks so how do you all initiate them? What's the probably allocating / deallocating methods, etc. </p>