How to swap two items in an array using swapAt()
Swift version: 5.6
If you need to have two items in an array change places, the swapAt() method is exactly what you want: provide it two indexes inside your array, and the items at those positions will be swapped.
For example, consider this array:
var names = ["Paul", "John", "George", "Ringo"]If I wanted John and Paul to swap places, I’d swap positions 0 and 1, like this:
names.swapAt(0, 1)Note: swapAt() will trigger a fatal error if you try to swap beyond the length of the array.
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.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 8.0
Similar solutions…
- How to remove duplicate items from an array
- How to remove items from an array using filter()
- How to enumerate items in an array
- How to loop over non-nil items in an array
- Check whether all items in an array match a condition
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
