Merge branch 'master' of https://github.com/CyC2018/Interview-Notebook

2019-02-13 10:41:54 +08:00
parent 53e078cb96 981ecb8c43
commit 14c00f18e4
4 changed files with 7 additions and 8 deletions
--- a/docs/notes/剑指
+++ b/docs/notes/剑指
@ -244,11 +244,10 @@ public String replaceSpace(StringBuffer str) {

 ```java
 public ArrayList<Integer> printListFromTailToHead(ListNode listNode) {
-    ArrayList<Integer> ret = new ArrayList<>();
-    if (listNode != null) {
-        ret.addAll(printListFromTailToHead(listNode.next));
-        ret.add(listNode.val);
-    }
+    if (listNode == null) 
+        return new ArrayList<>();
+    ArrayList<Integer> ret = printListFromTailToHead(listNode.next);
+    ret.add(listNode.val);
    return ret;
 }
 ```