How to split an array into chunks
Swift version: 5.1
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)
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Available from iOS 8.0
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