Exports cartesian product

Author: mgechev

src/combinatorics/cartesianproduct.js

@@ -1,21 +1,25 @@
-var cartesianProduct = (function () {
+(function (exports) {
   'use strict';
-  var result;
+  var cartesianProduct = (function () {
+    var result;
 
-  function cartesianProduct(sets, index, current) {
-    if (index === sets.length) {
-      return result.push(current.slice());
+    function cartesianProduct(sets, index, current) {
+      if (index === sets.length) {
+        return result.push(current.slice());
+      }
+      for (var i = 0; i < sets[index].length; i += 1) {
+        current[index] = sets[index][i];
+        cartesianProduct(sets, index + 1, current);
+      }
     }
-    for (var i = 0; i < sets[index].length; i += 1) {
-      current[index] = sets[index][i];
-      cartesianProduct(sets, index + 1, current);
-    }
-  }
 
-  return function (sets) {
-    result = [];
-    cartesianProduct(sets, 0, []);
-    return result;
-  };
-}());
+    return function (sets) {
+      result = [];
+      cartesianProduct(sets, 0, []);
+      return result;
+    };
+  }());
+
+  exports.cartesianProduct = cartesianProduct;
 
+}(typeof exports === 'undefined' ? window : exports));