Use module_eval to create dynamic method : module_eval « Reflection « Ruby

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Ruby » Reflection » module_eval   Use module_eval to create dynamic method class Numeric   [['add', '+'], ['subtract', '-'],    ['multiply', '*',], ['divide', '/']].each do |method, operator|     module_eval %{ def #{method}_2                      self #{operator} 2                    end }   end end 4.add_2                                                  # => 6 10.divide_2                                              # => 5   Related examples in the same category 1.  Add a new method with module_eval

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