Add toArray to NodeList

Having added the `toArray` for HTMLCollection to help with results of
getElementsByTagName, I had a similar need arise for querySelectorAll.
This behaviour has now been implemented, and actually exported this
time!

Author: Tom

src/DOM/Node/NodeList.js

@@ -6,6 +6,12 @@ exports.length = function (list) {
   };
 };
 
+exports.toArray = function (list) {
+  return function () {
+    return [].slice.call(list);
+  };
+};
+
 exports._item = function (index) {
   return function (list) {
     return function () {

src/DOM/Node/NodeList.purs

@@ -1,6 +1,7 @@
 module DOM.Node.NodeList
   ( length
   , item
+  , toArray
   ) where
 
 import Prelude
@@ -13,6 +14,9 @@ import DOM.Node.Types (Node, NodeList)
 -- | The number of items in a NodeList.
 foreign import length :: forall eff. NodeList -> Eff (dom :: DOM | eff) Int
 
+-- | The elements of a NodeList represented in an array.
+foreign import toArray :: forall eff. NodeList -> Eff (dom :: DOM | eff) (Array Node)
+
 -- | The item in a NodeList at the specified index, or Nothing if no such node
 -- | exists.
 item :: forall eff. Int -> NodeList -> Eff (dom :: DOM | eff) (Maybe Node)