OOP: ʰԳí辱Dz e Padroes
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The document provides an introduction to object-oriented programming (OOP) principles and design patterns. It discusses the four pillars of OOP - abstraction, encapsulation, modularity, and hierarchy. It then defines what an object is in terms of its properties of state, behavior, and identity. The document outlines several OOP principles like least astonishment, command query separation, tell don't ask, and the law of Demeter. It concludes by briefly introducing some common design patterns like decorator, strategy, chain of responsibility, composite, template method, and facade.
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But what if functions couldn't call themselves?
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OOP: ʰԳí辱Dz e Padroes
- 1. Orientação a Objetos ʰԳí辱Dz e ʲõ
- 2. Quem sou eu? ‣ Programador no Glio ‣ Trabalhei na Dafiti, Emprego Ligado e Tripda ‣ Não mexo com PHP faz exatamente 1 ano ‣ Ruby ‣ @nelson_senna
- 3. Agenda ‣ Uma breve introdução a OOP ‣ Os primos pobres do S.O.L.I.D ‣ ʲõ de projeto (GoF)
- 5. O que é Orientação a Objetos?
- 7. O método é apoiado por quatro pilares
- 8. ٰçã
- 11. “If a precondition is violated, this means that a client has not satisfied its part of the bargain, and hence the server cannot proceed reliably. Similarly, if a postcondition is violated, this means that a server has not carried out its part of the contract, and so its clients can no longer trust the behavior of the server.” Grady Booch
- 12. Encapsulamento
- 15. “No part of a complex system should depend on the internal details of any other part” Ingalls, D.
- 16. Modularidade
- 19. “The overall goal of the decomposition into modules is the reduction of software cost by allowing modules to be designed and revised independently.... Each module's structure should be simple enough that it can be understood fully;” Britton and Parnas
- 20. Hierarquia
- 23. “Inheritance makes it possible to define new software in the same way we introduce any concept to a newcomer, by comparing it with something that is already familiar” Cox, B.
- 24. O que é um objeto?
- 26. Propriedades de um objeto ‣ Estado ‣ Comportamento ‣ Identidade
- 27. “The state of an object encompasses all of the (usually static) properties of the object plus the current (usually dynamic) values of each of these properties.” Grady Booch
- 28. “The state of an object represents the cumulative results of its behavior.” Grady Booch
- 29. “Assim como átomos podem existir repetidas vezes, a identidade possibilita que múltiplas instâncias possam coexistir.” Um troxa aí
- 30. Objetos não são sacos de dados!
- 31. ʰԳí辱Dz
- 34. Tell don’t ask
- 35. Law of Demeter
- 36. ʲõ
- 37. Decorator
- 38. Strategy
- 40. Composite
- 41. Template Method
- 42. Facade
- 43. ú岹?
- 45. Lista de imagens ‣ Builders: https://flic.kr/p/mjweU ‣ Ikebana: https://flic.kr/p/6P7McX ‣ Boundary: https://flic.kr/p/3QrzLy ‣ Modularity: https://flic.kr/p/9sdBqQ ‣ Hierarchy: https://flic.kr/p/fgGtcP ‣ Objects: https://flic.kr/p/AD4FMh
- 46. Referências ‣ Tell don’t ask: https://pragprog.com/articles/tell-dont-ask ‣ OOP: Object-Oriented Analysis and Design with Applications - Grady Booch et al ‣ Law of Demeter: http://www.ccs.neu.edu/research/demeter/demeter- method/LawOfDemeter/paper-boy/demeter.pdf ‣ CQS: http://martinfowler.com/bliki/CommandQuerySeparation.html ‣ Least Astonishment: http://c2.com/cgi/wiki?PrincipleOfLeastAstonishment ‣ Design Patterns: Design Patterns: Elements of Reusable Object-Oriented Software - Gamma et al ‣ Decorator: https://8thlight.com/blog/doug-bradbury/2016/07/18/not-a- decorator-ruby.html ‣ Template Method: https://medium.com/ruby-on-rails/what-i-learned-from- sandi-metz-9d0c94347b7f#.2y8u1prb4