If you’re using Ruby on Rails to create your Web site or database, you need to know the keywords Ruby uses. Fortunately, you have access to the following table, which lists Ruby’s keywords:
| alias | defined? | __FILE__ | not | then |
| and | do | for | or | true |
| BEGIN | else | if | redo | undef |
| begin | elsif | in | rescue | unless |
| break | END | __LINE__ | retry | until |
| case | end | module | return | when |
| class | ensure | next | self | while |
| def | false | nil | super | yield |
dummies
Source:http://www.dummies.com/how-to/content/ruby-on-rails-keywords.html
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