public 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)])
}
}
}
let records = [1, 2, 3, 4, 5, 6, 7, 8, 9]
let chunks = records.chunked(into: 2)
// chunks = [[1, 2], [3, 4], [5, 6], [7, 8], [9]]