rêver flatten modification

addon/utils/flatten.js

@@ -5,12 +5,16 @@
 
 export default function flatten(array = []) {
   let result = [];
-  for(let item of array) {
+
+  for (var i = 0, l = array.length; i < l; i++) {
+    let item = array[i];
+
     if (Array.isArray(item)) {
       result = result.concat(flatten(item));
     } else {
       result.push(item);
     }
   }
+
   return result;
 }