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Duck Typing

Avatar for Javier Cervantes Javier Cervantes
May 30, 2014
Programming
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76

Duck Typing

Based on chapter #5 of POODR.

Given at rubygdl.org.

Avatar for Javier Cervantes

Javier Cervantes

May 30, 2014
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Transcript

  1. Duck Typing @ruby_gdl << @solojavier # Based on chapter 5

    of book poodr.com

  2. What is Duck Typing "If an object quacks like a

    duck and walks like a duck, then it's a duck" Technique that help us reduce cost of change Public interfaces not tied to any specific class Duck typed objects are chameleons that are defined more by their behaviour than by their class

  3. Learning by example

  4. None
  5. None

  6. requirements.change!

  7. None
  8. None

  9. code_design.add(:duck_typing)

  10. None
  11. None
  12. None

  13. Summary Duck typing detaches public interfaces from classes It creates

    virtual types defined by behaviour Depending on this abstractions increases flexibility This will make your application easier to change