In Projects, you can keep track of your progress as you go throught the tasks. Check each item as you complete it!
Why are services useful? Instead of filling the controller with code to fetch weather data from a server, it's better to move this independent logic into a service so that it can be reused by other parts of the app.
What can we generalize so far?
Directives are a way to make standalone UI components, like <app-info>
Services are a way to make standalone communication logic, like forecast which fetches weather data from a server
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