Add a new method with module_eval : module_eval « Reflection « Ruby

1. Ruby
2. Reflection
3. module_eval

Add a new method with module_eval

class String
  module_eval %{def last(n)
                  self[-n, n]
                end}
end
p "Here's a string.".last(7)               # => "string."

String.module_eval %{def last(n)
                       self[-n, n]
                     end}

p "Here's a string.".last(7)               # => "string."

 

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