Handy DataMapper uninstall script
gem list '\A(?:(?:d[mo])[_-]|data_?(?:mapper|objects)|extlib)' --no-versions | xargs sudo gem uninstall -aIx
(Via Dan Kubb and gist: 31187.
gem list '\A(?:(?:d[mo])[_-]|data_?(?:mapper|objects)|extlib)' --no-versions | xargs sudo gem uninstall -aIx
(Via Dan Kubb and gist: 31187.