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what is the defined operator?
when self.up and self.down method is used?
how you can create a controller for subject?
how can we define Ruby regular expressions?
how you can run Rails application without creating databases?
how you define Instance Variable, Global Variable and Class Variable in Ruby?
what is the difference between the Observers and Callbacks in Ruby on Rails?
what is rake in Rails?
what is the purpose of RJs in Rails?
what is the command to create a migration?
what is the role of Rails Controller?
what is the difference between redirect and render in Ruby on Rails?
how you can list all routes for an application?
what is the difference between Active support’s “HashWithIndifferent” and Ruby’s “Hash” ?
what are the limits of Ruby on Rails?
