Monitor a tab's frames as a list with the current frame at its head

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/utils.coffee b/lib/utils.coffee
index b7f8731a..428112c8 100644
--- a/lib/utils.coffee
+++ b/lib/utils.coffee
@@ -147,6 +147,13 @@ Array.copy = (array) -> Array.prototype.slice.call(array, 0)
 
 String::startsWith = (str) -> @indexOf(str) == 0
 
+Array::rotate = (count) ->
+  return this if @length == 0
+  count = count % @length
+  count = count + @length if count < 0
+  Array::push.apply(this, @splice(0, count))
+  this
+
 globalRoot = window ? global
 globalRoot.extend = (hash1, hash2) ->
   for key of hash2