Chapter 2. A comprehensive example

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  • Comprehensive example
  • Doing it wrong
  • Doing it right

Telling you that a sauce béarnaise is “an emulsified sauce made from egg yolk and butter” doesn’t magically instill in you the ability to make one. The best way to learn is to practice; an example can often bridge the gap between theory and practice. Watching a professional cook making a sauce béarnaise is helpful before you try it out yourself.

When I introduced Dependency Injection in the last chapter, I presented a high-level tour to help you understand its purpose and general principles. However, this simple example didn’t do justice to DI. DI is a way to enable loose coupling, and loose coupling is first and foremost an efficient way to deal ...

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