Add logic for more customizable password generator

passKit/Extensions/Array+Slices.swift

@@ -0,0 +1,28 @@
+//
+//  Array+Slices.swift
+//  passKit
+//
+//  Created by Danny Moesch on 28.02.20.
+//  Copyright © 2020 Bob Sun. All rights reserved.
+//
+
+extension Array {
+
+    func slices(count: UInt) -> [ArraySlice<Element>] {
+        guard count != 0 else {
+            return []
+        }
+        let sizeEach = Int(self.count / Int(count))
+        var currentIndex = startIndex
+        var slices = [ArraySlice<Element>]()
+        for _ in 0 ..< count {
+            let toIndex = index(currentIndex, offsetBy: sizeEach, limitedBy: endIndex) ?? endIndex
+            slices.append(self[currentIndex ..< toIndex])
+            currentIndex = toIndex
+        }
+        if currentIndex != endIndex {
+            slices[slices.endIndex - 1].append(contentsOf: self[currentIndex ..< endIndex])
+        }
+        return slices
+    }
+}