massix/objc-zmq — comment on commit 7d40c440258a911de5ddda1c36727f3ab1ce665a
File:  line 0
By jeremy-w:

The project predates Xcode 4. Nowadays, I add xcuserdata/ to .gitignore alongside the older per-user config filenames. I feel that user-specific files belong on that user's machine, not in a shared repository.