September 2018
Intermediate to advanced
302 pages
7h 17m
English
Content preview from Hands-On Design Patterns with React Native
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Why recognize side effects?
Side effects manipulate the state that is not the property of the function. Hence, when we look at the function in isolation, it is hard to assess whether the function has any negative implications on the application. This is not only true in unit tests; it is also cumbersome when it comes to mathematical proofs. Some big applications that must be secure can strive to build a mathematical model that is bullet-proof. Such apps are proved using math tools that go beyond the material of this book.
Side effects, when isolated, may work as data providers to our app. They can "inject" into the flow at the best moment, and from then on, data is treated as if it was just a variable. Going from one side effect free, function ...
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