What are the differences between decorators and modules in Ruby?

What are the differences between decorators and modules in Ruby?

In Ruby, decorators are used to modify or enhance methods, while modules are used for namespacing and mixins. Would you like to know more about how to implement them?

Yes, can you give me an example of a decorator?

Sure! Here's a simple example of a decorator in Ruby:

def my_decorator
  ->(method) do
    ->(*args) do
      puts 'Before method call'
      result = method.call(*args)
      puts 'After method call'
      result
    end
  end
end

@my_decorator
def my_method
  puts 'Inside my method'
end

This decorator adds behavior before and after the method call.

What about modules? How do they work?

Modules in Ruby are collections of methods and constants. They can be included in classes to share functionality. For example:

module MyModule
  def greet
    puts 'Hello!'
  end
end

class MyClass
  include MyModule
end

obj = MyClass.new
obj.greet  # Outputs: Hello!

This allows MyClass to use the greet method from MyModule.