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Extract Part Of Class In Ruby Into Separate Class

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        When you need to split class into seveal parts...

New file:
  ClassPart = proc do
    <copy here code you want to move out of the main class>

Original class:
  class MainClass
    class_eval &ClassPart

I used this approach to create a recycled bin: when i find some functionality not very valuable i move it to the 'recycled bin' part of class. i keep it there for a while. then i delete it altogether from code.