cheat sheets.

gem "foobar", "2.0"

# from git
gem "rails", :git => "git://github.com/rails/rails.git"
# gem name is different from require
gem "sqlite3-ruby", :require => "sqlite3"


# use group for different sets of dependencies
group :test do
  gem "rspec-rails", ">=2.0.0.beta.2"
  gem "machinist", ">=1.0.6"
  gem "faker", '>=0.3.1'
end