From b5d092101521f36096add7ddef540c1a049b3e07 Mon Sep 17 00:00:00 2001
From: Amanda Ghassaei <amandaghassaei@gmail.com>
Date: Tue, 27 Jan 2015 20:12:17 -0500
Subject: [PATCH] clear all works again

---
 js/models/lattice.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/js/models/lattice.js b/js/models/lattice.js
index 89a72c24..b8cc3f93 100644
--- a/js/models/lattice.js
+++ b/js/models/lattice.js
@@ -158,8 +158,15 @@ Lattice = Backbone.Model.extend({
     },
 
     clearCells: function(){
-        _.each(this.get("cells"), function(cell){
-            if (cell.remove) cell.remove();
+        _.each(this.get("cells"), function(cellLayer){
+            _.each(cellLayer, function(cellCol){
+                _.each(cellCol, function(cell){
+                    if (cell) {
+                        cell.remove();
+                    }
+                });
+            });
+
         });
         this.set("cells", this.defaults.cells);
         this.set("numCells", 0);
-- 
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