Ruby String exercises: Check whether a string contains a substring - w3resource
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Ruby array.include?() Method - Scaler Topics
Ruby gsub function - YouTube
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Active Record Query Interface — Ruby on Rails Guides
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Ruby: How to check a string contains another string
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Ruby Convert Array to String
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Ruby Check if String Contains Substring
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Ruby array.include?() Method - Scaler Topics
Ruby include (Array, String) - Dot Net Perls
Ruby | Dir Class and its methods - GeeksforGeeks
Ruby String Methods (Ultimate Guide) - RubyGuides
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Type Inference in RubyMine | The RubyMine Blog
How to Use Strings in Ruby | Mix & Go
