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 | Clean Code: A Handbook of Agile Software Craftsmanship | Robert C. Martin |
 | The Pragmatic Programmer Your Journey to Mastery, 20th Anniversary Edition| Andrew Hunt David Hurst Thomas |
 
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+## App Life Cycle
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+[iOS App Life Cycle](https://medium.com/@neroxiao/ios-app-life-cycle-ec1b31cee9dc)
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 ## Design Pattern