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Let’s take a look at 3 simple techniques for avoiding state in our code.

Great applications do not lose user's progress and app state. They automatically save the necessary data without interrupting the user and transparently restore themselves as and when necessary - e.g. after coming back from a background state or an unexpected shutdown.

In multiplayer games, one of the most complex issues is to keep all player's state in sync with the server state. There are a few good articles around this topic on the internet. However, some details are missing here and there, which may be confusing for beginners in the field of game programming.