1 files changed, 12 insertions, 0 deletions
diff --git a/src/helpers.js b/src/helpers.js
index aa23bbe..2a52a1b 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -1,3 +1,15 @@
+// creates deep clone of array
+function array_clone(arr){
+  var clone = arr.slice(0)
+  for(var i = clone.length; i--;){
+    if(Array.isArray(clone[i])){
+      clone[i] = array_clone(clone[i])
+    }
+  }
+  return clone
+}
+
+// tests if a given element is instance of an object
 function is(el, obj){
   return el instanceof obj
 }