Question

NSMutableArray *insideArray = [[NSMutableArray alloc] init];
NSMutableArray *outsideArray = [[NSMutableArray alloc] init];
[insideArray addObject:@”Hello 1″];
[insideArray addObject:@”Hello 2″];
[outsideArray addObject:insideArray];
[insideArray removeAllObjects];
[insideArray addObject:@”Hello 3″];
[insideArray addObject:@”Hello 4″];
[outsideArray addObject:insideArray];
The current output is

    array(
      (
       "Hello 3",
       "Hello 4"
       ),
      (
       "Hello 3",
       "Hello 4"
       )
      )

I need a way to get the output to be

    array(
      (
       "Hello 1",
       "Hello 2"
       ),
      (
       "Hello 3",
       "Hello 4"
       )
      )

Does anyone have a solution or could see where i’ve gone wrong? Thanks

Answer 1

You’re using the same NSMutableArray for both sub-arrays. You need to use two different objects. Specifically, instead of

[insideArray removeAllObjects];

instead use

[insideArray release];
insideArray = [NSMutableArray array];

for the quickest solution.