This is a simple change that is going to go a long way to help code readability. As you know, Swift developers prefer declaring things as constants (using
let) rather than variables (using
var). But what if you made something a variable by accident? Or if you thought you might need to change it, then never do?
As of Xcode 7 and Swift 2, you'll get warnings in your code whenever you declare variables that never change – Xcode literally examines the way you use the variable and knows if you never change it.
SAVE 50% To celebrate Black Friday, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.
Link copied to your pasteboard.