From 5d06c7abe957872a39bc479221d580ced638483c Mon Sep 17 00:00:00 2001
From: Matt Huntington <matt.huntington@gmail.com>
Date: Tue, 16 Aug 2016 00:56:29 -0400
Subject: [PATCH] commenting

---
 public/js/app.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/public/js/app.js b/public/js/app.js
index 588127b..12dfbf7 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -56,6 +56,7 @@ var render = function(){
 	d3.json('/runs', function(error, data){
 		var circles = d3.select('svg').selectAll('circle')
 			.data(data, function(d){
+				//match data based on d.id, not index
 				return d.id
 			});
 		circles
@@ -68,6 +69,7 @@ var render = function(){
 				return yScale(datum.distance);
 			});
 		circles.exit().remove();
+		//attach event handlers after circle creation
 		attachDeleteHandlers();
 	});
 };