In the code below I'm making a new NSString with alloc and initializing it with the contents of some file. Because I'm calling alloc I know it's my responsibility to call release on the string when I'm done. But what about the variables "lines" and "line"? Since the method "componentsSeparatedByString" does not start with the word "new" or "create" can I assume "lines" will be autoreleased? Same question for "line" since "objectAtIndex" also does not start with "new" or "create".

  NSString* buffer = [[NSString alloc] initWithData:[fileManager contentsAtPath:@"/foo"]
                               encoding:NSUTF8StringEncoding];

  NSArray* lines = [buffer componentsSeparatedByString:@"\n"];
  NSString* line = [lines objectAtIndex:5];

  // do something with line

  [buffer release];

So is the code above okay? Or should I be calling "release" on lines and line too? Thanks.