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Data Structures in Swift: A Practical Guide for iOS Developers

· 6 min read
Don Peter
Cofounder and CTO, Appxiom

Every Swift developer eventually runs into the same moment.

The app works fine… until it doesn't.

Scrolling becomes sluggish. Memory usage slowly creeps up. A feature that worked perfectly in testing starts behaving strangely in production. And when you dig deep enough, the issue often traces back to one thing: how data is stored and managed.

That's where swift data structures come in.

This blog is a practical walkthrough of data structures in Swift, not from a textbook point of view, but from how they actually show up in real iOS apps. If you've ever wondered how DSA in Swift connects to everyday development, this guide is for you.