@@ -0,0 +1,28 @@
+var permutations = (function () {
+  'use strict';
+
+  var res;
+
+  function swap(arr, i, j) {
+    var temp = arr[i];
+    arr[i] = arr[j];
+    arr[j] = temp;
+  }
+
+  function permutations(arr, current) {
+    if (current >= arr.length) {
+      return res.push(arr.slice());
+    }
+    for (var i = current; i < arr.length; i += 1) {
+      swap(arr, i, current);
+      permutations(arr, current + 1);
+      swap(arr, i, current);
+    }
+  }
+
+  return function (arr) {
+    res = [];
+    permutations(arr, 0);
+    return res;
+  };
+}());