Understand Inversion of Control (IoC)
gh-pagesInversion of Control is a design principle used to loosen dependencies by separating organizational control from the objects themselves. Instead of an object being responsible for instantiating its own dependencies, those dependencies are controlled and instantiated elsewhere in the system (typically via Dependency Injection). This prevents the common pitfall of simply moving dependencies into a base controller or super object, and instead allows for injecting only the specific dependencies required at the moment they are needed.