From: Eugene Crosser <crosser@average.org>
Date: Fri, 25 Dec 2015 21:16:24 +0000 (+0300)
Subject: fix total calculation for empty dataset
X-Git-Url: http://www.average.org/gitweb/?p=pulsecounter.git;a=commitdiff_plain;h=518d7ac2a0b474e133a2803cd8e05a858d12a647;hp=52f2a01b64c56d1c0e27a411fe524a926b59c398

fix total calculation for empty dataset
---

diff --git a/web/index.html b/web/index.html
index 0c6c177..a1745af 100644
--- a/web/index.html
+++ b/web/index.html
@@ -241,10 +241,14 @@
     document.getElementById("curhot").innerHTML =
       (data.current.hot / 100).toFixed(2);
 
-    document.getElementById("totcold").innerHTML =
-      ((data.cold[data.cold.length - 1][1] - data.cold[0][1]) * 10);
-    document.getElementById("tothot").innerHTML =
-      ((data.hot[data.hot.length - 1][1] - data.hot[0][1]) * 10);
+    if (data.cold.length)
+      document.getElementById("totcold").innerHTML =
+        ((data.cold[data.cold.length - 1][1] - data.cold[0][1]) * 10);
+    else document.getElementById("totcold").innerHTML = "0";
+    if (data.hot.length)
+      document.getElementById("tothot").innerHTML =
+        ((data.hot[data.hot.length - 1][1] - data.hot[0][1]) * 10);
+    else document.getElementById("tothot").innerHTML = "0";
 
     tmin = data.range.lo;
     tmax = data.range.hi;