Swiftで配列をn個の要素に分割する

Array+chunked.swift

extension Array {
    func chunked(by chunkSize: Int) -> [[Element]] {
        return stride(from: 0, to: self.count, by: chunkSize).map {
            Array(self[$0..<Swift.min($0 + chunkSize, self.count)])
        }
    }
}

let arr = [0,1,2,3,4,5,6,7,8,9]
print(arr.chunked(by: 2)) // [[0, 1], [2, 3], [4, 5], [6, 7], [8, 9]]
print(arr.chunked(by: 3)) // [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9]]