Ruby on Rails Guides 
Ruby on Rails Guides
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How to handle subdomains in Rails?
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What are the differences between `:before_action` and `:after_action` in Rails?
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How to implement a payment gateway in Rails?
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What are jobs in Rails and how to use them?
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What are the pros and cons of Ruby on Rails?
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How to create custom validators in Rails?
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How to integrate WebSockets in Rails?
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What are the testing tools and libraries in Rails?
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How to use the Rails API-only mode?

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