@@ -0,0 +1,40 @@
+/**
+ * @param {number[]} nums
+ * @return {number[][]}
+ */
+var permuteUnique = function(nums) {
+    var uniqueList = [nums];
+    performAllPermutations(uniqueList, nums, nums.length);
+    return uniqueList;
+};
+
+function performAllPermutations(uniqueList, nums, length){
+    for(var i = 0; i < length; i++){
+        if(i == length - 1){
+          return;
+        }
+        
+        var newList = nums.slice();
+        newList[i] = nums[i+1];
+        newList[i+1] = nums[i];
+
+        //check if newList is present in uniqueList
+        var doCombExists = false;
+        for(var j = 0; j < uniqueList.length; j++){
+          var k = 0;
+          for(k = 0; k < length; k++){
+            if(newList[k] !== uniqueList[j][k]){
+              break;
+            }
+          }
+          if(k == length){
+            doCombExists = true;
+            break;
+          }
+        }
+        if(!doCombExists){
+          uniqueList.push(newList);
+          performAllPermutations(uniqueList,newList, length);
+        }
+  }
+}