====== returning multiple values ======
  * correct example:<code objc>
Bool isDir;

// path is an NSString *
// &isDir means the address of the isDir variable

if([filemanager fileExistsAtPath:path isDirectory:&isDir] && !isDir){
  // do something - we have a valid file that is not a directory
}
</code>
  * along with this, remember that just creating a pointer doesn't create anything in memory - incorrect example:<code objc>
Bool *isDir;
if([filemanager fileExistsAtPath:path isDirectory:isDir] && !isDir){
  // !! THIS WILL NOT WORK !!
}
</code>