how many types of callbacks available in ror?
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Explain what are the servers supported by ruby on rails?
How would you create a controller for the subject?
What is the difference between render and redirect?
How are the key differences between python and ruby?
Explain rvm in rails?
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when self.up and self.down method is used?
iam new to the ruby on rails. suggest me some pdf and online books for ruby and rails
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