Preview Singletons are entities, referenced to the same instance of a class from everywhere in your code. It doesn't matter if you like them or not, you will definitely meet them, so it's better to understand how they work. Constructing and handling a set of data doesn't seem to be a big challenge at first glance. The problems appear when you try to optimise the user experience with background work and your app starts acting weird. ??♂️ After decades of watching your display mostly with a blank face, you finally realize that your data isn't handled consistently by the manager because you're accessing it (running tasks on it) from multiple threads at the same time. So you really do have to deal with making your singletons thread safe. This article series is dedicated to thread handling using Swift. In the first part below you will get a comprehensive insight into som...
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