What is dependency injection
In: Technology
It just means you compose functionality. The human body is a composite of organs, for example. Whenever your body needs something, it delegates tasks based off of functionality to the systems and subsequent organs responsible. It communicates these instructions via signals from the top down, rather than the other way around. This is what defines the composition.
When you need to breathe, a part of your brain will tell your lungs to expand, and they pull in air. Some passive systems will pick up the result from breathing in, and eventually affect how your entire body feels.
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