From f6ac1f7e372d7e9d98fbe4e7dfab881175c10f42 Mon Sep 17 00:00:00 2001
From: Pitchaya Boonsarngsuk <2285135b@student.gla.ac.uk>
Date: Fri, 2 Feb 2018 12:18:40 +0000
Subject: [PATCH] Fix ultra-rare case of jiggle = 0

---
 src/jiggle.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/jiggle.js b/src/jiggle.js
index f3ab83e..15e8c15 100644
--- a/src/jiggle.js
+++ b/src/jiggle.js
@@ -1,6 +1,10 @@
 /**
- * @return {number} a random number.
+ * @return {number} a very small non-zero random number.
  */
 export default function() {
-  return (Math.random() - 0.5) * 1e-6;
+  let rand;
+  do {
+    rand = (Math.random() - 0.5) * 1e-6;
+  while (rand === 0);
+  return rand;
 }