Create permutations.js

Create permutations.js

Author: PranamBhat

JavaScript/permutations.js

@@ -0,0 +1,35 @@
+/**
+ * @param {number[]} nums
+ * @return {number[][]}
+ */
+
+var permute = function(nums) {
+    
+  var res = [];
+
+  dfs(res, [], nums);
+
+  return res;
+    
+};
+
+var dfs = function (res, arr, nums) {
+    
+  var len = nums.length;
+  var tmp1 = null;
+  var tmp2 = null;
+
+  if (!len) return res.push(arr);
+
+  for (var i = 0; i < len; i++) {
+    tmp1 = Array.from(arr);
+    tmp1.push(nums[i]);
+
+    tmp2 = Array.from(nums);
+    tmp2.splice(i, 1);
+
+    dfs(res, tmp1, tmp2);
+      
+  }
+    
+};