Collections in Swift

Get a practical introduction to one of the most essential building blocks of Swift programming with this free sample chapter from Swift: The Practical Guide. Chapter 3 dives into collections, showing you how to organize and manage data efficiently using Swift's three core collection types. You'll learn:

• Arrays — ordered, indexed lists for storing sequences of values
• Sets — unordered collections that guarantee uniqueness and fast lookup
• Dictionaries — flexible key-value structures for storing related data
• How to create, access, modify, and iterate through each collection type
• Powerful built-in functions like filter, map, reduce, and more

Whether you're just getting started with iOS development or brushing up on Swift fundamentals, this chapter gives you the hands-on foundation you need to work with data structures confidently.

• Perfect for beginners taking their first steps beyond basic variables
• Valuable for developers coming from other languages who want to understand Swift's approach to collections

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This download is taken from Chapter 3 of the book Swift: The Practical Guide.