Merge pull request wangzheng0822#267 from IceBlackTea/master

修复 size getter 方法导致的死循环
liucz880415 · Mar 14, 2019 · d97d22a · d97d22a
2 parents e0cd3f7 + cf40a77
commit d97d22a
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/swift/08_stack/StackBasedOnLinkedList.swift b/swift/08_stack/StackBasedOnLinkedList.swift
@@ -14,8 +14,10 @@ struct StackBasedOnLinkedList<Element>: Stack {
 
     var size: Int {
         var count = 0
-        while head.next != nil {
+        var cur = head.next
+        while cur != nil {
             count += 1
+            cur = cur?.next
         }
         return count
     }