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The power of sets in Swift
Although Set is one of those core data structures that you see in almost every programming language - it sometimes get a bit overlooked as our default choice for storing collections of non-keyed objects tend to be to use an Array.

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Blog posts
XCTestCase exposes a property, defaultPerformanceMetrics, whose documentation strongly suggests can be used to add additional performance metrics.
Have you ever been using an app and a certain feature just seemed to be overwhelmingly sluggish compared to the rest of the app?

Modern alternative to NSTimer in Swift.

Implementing a concurrent version of the map method for arrays.

Curated by Infinum's iOS team.
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