Answer / Ravi Prabhat

You can use the `delete_if` method to remove all nil values from an array in Ruby. For example: `my_array.delete_if {|element| element.nil?}`

In Ruby code, often it is observed that coder uses a short hand form of using an expression like array.map(&:method_name) instead of array.map { |element| element.method_name }. How this trick actually works?

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What is the difference between ruby 1.9 and ruby 2.0?

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what is the difference extend and include?

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Explain the difference between nil and false in ruby?

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Explain the concepts and capabilities of garbage collection feature of Ruby?

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What is the use of interpolation in ruby?

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What is request.xhr?

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What are Ruby iterators?

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What is rvm?

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Explain ruby ranges. What are the ways to define ranges?

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Explain Ruby module?

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Does hash use “ #==” or “#eql?” To compare hash keys?

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