Minor styling fixes to comb sort

Author: kelvinlauKL

Comb Sort/Comb Sort.playground/Contents.swift

@@ -5,45 +5,37 @@
 import Cocoa
 
 func combSort (input: [Int]) -> [Int] {
-    var copy: [Int] = input
-    var gap = copy.count
-    let shrink = 1.3
-    
-    while gap > 1 {
-        gap = (Int)(Double(gap) / shrink)
-        if gap < 1 {
-            gap = 1
-        }
-        
-        var index = 0
-        while !(index + gap >= copy.count) {
-            if copy[index] > copy[index + gap] {
-                swap(&copy[index], &copy[index + gap])
-            }
-            index += 1
-        }
+  var copy = input
+  var gap = copy.count
+  let shrink = 1.3
+
+  while gap > 1 {
+    gap = Int(Double(gap) / shrink)
+    if gap < 1 {
+      gap = 1
     }
-    return copy
-}
 
-// A function to swap two integer values
-// Used for swapping within the array of values.
-func swap (inout a: Int, inout b: Int) {
-    let temp = a
-    a = b
-    b = temp
+    var index = 0
+    while index + gap < copy.count {
+      if copy[index] > copy[index + gap] {
+        swap(&copy[index], &copy[index + gap])
+      }
+      index += 1
+    }
+  }
+  return copy
 }
 
 // Test Comb Sort with small array of ten values
-let array: [Int] = [2, 32, 9, -1, 89, 101, 55, -10, -12, 67]
+let array = [2, 32, 9, -1, 89, 101, 55, -10, -12, 67]
 combSort(array)
 
 // Test Comb Sort with large array of 1000 random values
 var bigArray = [Int](count: 1000, repeatedValue: 0)
 var i = 0
 while i < 1000 {
-    bigArray[i] = Int(arc4random_uniform(1000) + 1)
-    i += 1
+  bigArray[i] = Int(arc4random_uniform(1000) + 1)
+  i += 1
 }
 combSort(bigArray)