CryptoSwift/Sources/CryptoSwift/Array+Extension.swift

//
//  ArrayExtension.swift
//  CryptoSwift
//
//  Created by Marcin Krzyzanowski on 10/08/14.
//  Copyright (c) 2014 Marcin Krzyzanowski. All rights reserved.
//

extension Array {

    /** split in chunks with given chunk size */
    func chunks(size chunksize: Int) -> [Array<Element>] {
        var words = Array<Array<Element>>()
        words.reserveCapacity(self.count / chunksize)
        for idx in stride(from: chunksize, through: self.count, by: chunksize) {
            words.append(Array(self[idx - chunksize..<idx])) // slow for large table
        }
        let reminder = self.suffix(self.count % chunksize)
        if !reminder.isEmpty {
            words.append(Array(reminder))
        }
        return words
    }
}