September Morn Update

Task/Sorting-algorithms-Cocktail-sort/Swift/sorting-algorithms-cocktail-sort.swift

@@ -0,0 +1,35 @@
+extension Collection where Element: Comparable {
+  public func cocktailSorted() -> [Element] {
+    var swapped = false
+    var ret = Array(self)
+
+    guard count > 1 else {
+      return ret
+    }
+
+    repeat {
+      for i in 0...ret.count-2 where ret[i] > ret[i + 1] {
+        (ret[i], ret[i + 1]) = (ret[i + 1], ret[i])
+        swapped = true
+      }
+
+      guard swapped else {
+        break
+      }
+
+      swapped = false
+
+      for i in stride(from: ret.count - 2, through: 0, by: -1) where ret[i] > ret[i + 1] {
+        (ret[i], ret[i + 1]) = (ret[i + 1], ret[i])
+        swapped = true
+      }
+    } while swapped
+
+    return ret
+  }
+}
+
+let arr = (1...10).shuffled()
+
+print("Before: \(arr)")
+print("Cocktail sort: \(arr.cocktailSorted())")