Start of action system re-write

app/imports/parser/parseTree/array.js

@@ -1,4 +1,4 @@
-import resolve, { toString, traverse } from '../resolve.js';
+import resolve, { toString, traverse, map } from '../resolve.js';
 import constant from './constant.js';
 
 const array = {
@@ -41,6 +41,13 @@ const array = {
     fn(node);
     node.values.forEach(value => traverse(value, fn));
   },
+  map(node, fn){
+    const resultingNode = fn(node);
+    if (resultingNode === node){
+      node.values = node.values.map(value => map(value, fn));
+    }
+    return resultingNode;
+  },
 }
 
 export default array;