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Swift Programming Tutorial: Nested Types
Quickly Learn the Importance of Nested Types for Cleaner Code
Pretend that you’re designing a spaceship (your Swift app), and it’s got all these cool parts — engine, control panel, laser cannons, you name it. Now, these parts don’t need to be flying around on their own; they belong inside the spaceship. Nested types let you define these parts inside the main spaceship structure, keeping your code nice and tidy, like organizing your socks in a drawer.
This article is part of my Swift Programming Tutorial series.
What Are Nested Types?
In Swift, nested types mean you can define a class, struct, or enum inside another class, struct, or enum. Why would you do this? To show that the inner type belongs to the outer type. It’s like saying, “This type is exclusively part of this other type. Nobody else can play with it unless they come through me.”
Why Use Nested Types?
- Context: Keeps related stuff together. You’re saying, “This thing makes sense only in the context of the outer thing.”
- Organization: Your code looks cleaner because you’ve grouped things logically. (Your future self will thank you.)
- Encapsulation: It’s like nesting a…
