Merge pull request #267 from IceBlackTea/master

修复 size getter 方法导致的死循环
2019-03-14 11:15:56 +08:00 · 2019-03-14 11:15:56 +08:00 · d97d22ad6d
commit d97d22ad6d
parent e0cd3f758d cf40a77268
1 changed files with 3 additions and 1 deletions
--- 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
    }