From 1bc6990fe584080dcca0249bdb05d8a7c56907cd Mon Sep 17 00:00:00 2001
From: Darragh <Darraghk500@yahoo.ie>
Date: Sat, 10 Jun 2017 15:49:46 +0100
Subject: [PATCH] Create ShellSortExample.swift

Inner while loop was slightly incorrect - for example try array [64, 20, 50, 33, 72, 10, 23, -1, 4,-2,-3] with previous version.
---
 Shell Sort/ShellSortExample.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Shell Sort/ShellSortExample.swift b/Shell Sort/ShellSortExample.swift
index e9cee7543..df0842770 100644
--- a/Shell Sort/ShellSortExample.swift	
+++ b/Shell Sort/ShellSortExample.swift	
@@ -22,7 +22,7 @@ public func shellSort(_ list : inout [Int]) {
 
             guard sublistCount == 1 && index > 0 else { continue }
 
-            while list[index - 1] > list[index] && index - 1 > 0 {
+            while index > 0 && list[index - 1] > list[index] {
                 swap(&list[index - 1], &list[index])
                 index -= 1
             }