Swift Basics: Array vs. Set

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Most iOS developers instinctively reach for an Array when using collections in Swift. I recommend stopping and thinking if a Set would work better. Sets offer better performance as well as a bunch of powerful methods to compare Sets.

This tutorial was created using Xcode 14 and iOS 16.

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Paul Hudson's Hacking With Swift:
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Timestamps:
0:00 - Is there better?
0:29 - Array vs. Set
1:33 - Time Complexity
2:20 - Code Examples
2:47 - Intersection
3:48 - Subtract
4:44 - Disjoint
5:22 - Union
6:06 - Symmetric Difference
7:03 - Subset & Superset
7:55 - Insert, Remove, Contains