!1952 Modify the same problem as the return value variable

Merge pull request !1952 from wangyong/sixDocs

zh-cn/application-dev/reference/apis/js-apis-linkedlist.md

@@ -68,7 +68,7 @@ add(element: T): boolean
 ```
 let linkedList = new LinkedList();
 let result = linkedList.add("a");
-let result = linkedList.add(1);
+let result1 = linkedList.add(1);
 let b = [1, 2, 3];
 linkedList.add(b);
 let c = {name : "lala", age : "13"};

zh-cn/application-dev/reference/apis/js-apis-vector.md

@@ -114,8 +114,8 @@ has(element: T): boolean
 let vector = new Vector();
 let result = vector.has("Ahfbrgrbgnutfodgorrogorgrogofdfdf");
 vector.add("Ahfbrgrbgnutfodgorrogorgrogofdfdf");
-let result = vector.has("Ahfbrgrbgnutfodgorrogorgrogofdfdf");
-```
+let result1 = vector.has("Ahfbrgrbgnutfodgorrogorgrogofdfdf");
+``` 
 
 ### getIndexOf