Answer Posted / Ankur Bhardwaj

The '█' parameter in Ruby is a shorthand syntax for defining block methods. It allows you to define a method that can be passed as a block of code to other methods. The '&' symbol is used to reference this block in the method definition.nFor example:nndef sum(&block)n block.call(1) { |num| num + 2 } # This calls the block with argument 1 and expects it to return a number that will be added by 2.nendnsum do |number|n number * numbernend

Tell me the role of modules and mixins in ruby?

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