How to split an array into chunks
Swift version: 5.2
If you have an array of elements and you want to split them into chunks of a size you specify, here’s a useful extension you can add to your code:
extension Array {
func chunked(into size: Int) -> [[Element]] {
return stride(from: 0, to: count, by: size).map {
Array(self[$0 ..< Swift.min($0 + size, count)])
}
}
}That converts an array into an array of arrays, using whatever size you specify. For example, if you have the numbers 1 to 100 in an array and you want to split it so that there are many arrays containing five numbers each, you’d write this:
let numbers = Array(1...100)
let result = numbers.chunked(into: 5)
SPONSORED ViRE offers discoverable way of working with regex. It provides really readable regex experience, code complete & cheat sheet, unit tests, powerful replace system, step-by-step search & replace, regex visual scheme, regex history & playground. ViRE is available on Mac & iPad.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 8.0
Similar solutions…
- How to split a string into an array: components(separatedBy:)
- How to split an integer into an array of its digits
- How to join an array of strings into a single string
- How to use reduce() to condense an array into a single value
- How to convert JSON into Swift objects using Codable
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
