So far we've been passing closures into functions that Swift provides — like sorted(), filter(), and map(). But what if you wanted to write your own function that accepts another function as a parameter? That's exactly what we're covering today. 🍥
This might sound complicated, but once you see it in action it starts to make a lot of sense — and it's everywhere in SwiftUI.
Why Would You Even Want This?
Before we write any code, let's think about why this matters.
Imagine you're building an anime battle app that needs to fetch data from a server — maybe pulling in a list of all One Piece characters. Your iPhone can do billions of things per second, but waiting for a server response can take half a second or more. That's practically glacial by comparison.
