iphone - Test to Understand Objective-C Vs Pointers -

i have wrote test code understand objective c vs c pointers. here code..

eg:

    nsmutablearray *array = [[nsmutablearray alloc] init];     nsmutablearray *sec_mut;     if (array) {         [array addobject:@"my"];          [array addobject:@"name"];          [array addobject:@"is"];          [array addobject:@"bob"];              sec_mut = [[nsmutablearray alloc] init];              if (sec_mut) {                 (id obj in array) { // allocating new object , adding or points existing memory (just adding address)?                     [sec_mut addobject:obj];                  }             }     }      [array removeobjectatindex:0];      (id obj in sec_mut) {         nslog(@"str %@\n",obj);     } 

output: str str name str is str bob

even though i've deleted object @ index 0 4 object displaying in new array, not pointing , having own object, right? or dangling pointer?

thanx

when inserting objects cocoa collections, objects not copied, retained. (i. e., yes, pointers used reference objects.)