#### Implementing Decorator Pattern Using ActiveSupport::Concern
Using `Class#class_eval` is great for simple adjustments, but for more complex class modifications, you might want to consider using [`ActiveSupport::Concern`](http://edgeapi.rubyonrails.org/classes/ActiveSupport/Concern.html) which helps manage load order of interlinked dependencies at run time allowing you to significantly modularize your code.
Using `Class#class_eval` is great for simple adjustments, but for more complex class modifications, you might want to consider using [`ActiveSupport::Concern`](http://edgeapi.rubyonrails.org/classes/ActiveSupport/Concern.html). ActiveSupport::Concern manages load order of interlinked dependent modules and classes at run time allowing you to significantly modularize your code.
**Adding**`Post#time_since_created`<br/>
**Overriding**`Post#summary`
**Adding**`Post#time_since_created` and **Overriding**`Post#summary`
