Progress

1) How to compare two folders in OSx. diff -rq '/firstFolderPath' '/secondFolderPath' In terminal; -rq means to search in subfolders and print short description. Example :  diff -rq '/Users/nikkov/Desktop/First' '/Users/ nikkov /Desktop/Second' 2) How to watch view hierarchy. NSLog(@"%@", [self.view recursiveDescription]); 3) How to exclude some files from compilation in Xcode. Target -> Build Settings -> Add User-Defined Setting -> Type "EXCLUDED_SOURCE_FILE_NAMES". In line's window type something like *.mm, *.h.