0047.全排列.md Javascript

problems/0046.全排列.md

@@ -189,7 +189,8 @@ Python：
 Go：
 
 Javascript:
-```Javascript
+
+```javascript
 
 var permute = function(nums) {
     let result = []

problems/0047.全排列II.md

@@ -220,6 +220,43 @@ class Solution:
         return res
 ```
 
+Javascript:
+
+```javascript
+
+var permuteUnique = function (nums) {
+    nums.sort((a, b) => {
+        return a - b
+    })
+    let result = []
+    let path = []
+
+    function backtracing( used) {
+        if (path.length === nums.length) {
+            result.push(path.slice())
+            return
+        }
+        for (let i = 0; i < nums.length; i++) {
+            if (i > 0 && nums[i] === nums[i - 1] && !used[i - 1]) {
+                continue
+            }
+            if (!used[i]) {
+                used[i] = true
+                path.push(nums[i])
+                backtracing(used)
+                path.pop()
+                used[i] = false
+            }
+
+
+        }
+    }
+    backtracing([])
+    return result
+};
+
+```
+