iphone - Problem with memory manament in Objective-C -

i have method:

-(nsarray   *)dosomething{      nsarray *array = [[nsarray alloc] initwithobjects:@"huy 1",@"huy 2",@"huy 3",nil];      [array  release];      return  array;  } 

and

- (void)viewdidload {      [super viewdidload];      nsarray *array  =   [self   dosomething];      if(array&&array.count>0){          nslog([nsstring stringwithformat:@"%@\n",[array objectatindex:1]]);      }     else{          nslog(@"null");      }  } 

i thinks released array on dosomething() won't return nsarray created on dosomething(). don't know still print "huy 2"? can tell me why?

-(nsarray *)dosomething {     nsarray *array = [[nsarray alloc] initwithobjects:@"huy 1",@"huy 2",@"huy 3",nil];      return  [array autorelease]; } 

memory management programming guide

- (void)viewdidload  {     [super viewdidload];     nsarray *array  =   [self dosomething];      if([array count]) //if array nil evaluate false. if count 0 evaluate false too.     {         nslog(@"%@\n", [array objectatindex:1]); //nslog insert values     }     else     {         nslog(@"null");     } } 

if works release instead of autorelease it's because memory array using has yet used else. chance. suspect if allocate object after nsarray *array = [self dosomething]; unexpected results.