From: Chris Rebert <github@chrisrebert.com>
Date: Tue, 1 Dec 2015 07:47:56 +0000 (-0800)
Subject: util.js: Add comment explaining ~~ trick
X-Git-Tag: v4.0.0-alpha.2~69^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F18391%2Fhead;p=thirdparty%2Fbootstrap.git

util.js: Add comment explaining ~~ trick

[skip sauce]
[skip validator]
---

diff --git a/js/src/util.js b/js/src/util.js
index f4a584125f..fccf6178cc 100644
--- a/js/src/util.js
+++ b/js/src/util.js
@@ -99,7 +99,7 @@ const Util = (($) => {
 
     getUID(prefix) {
       do {
-        prefix += ~~(Math.random() * 1000000)
+        prefix += ~~(Math.random() * 1000000) // "~~" acts like a faster Math.floor() here
       } while (document.getElementById(prefix))
       return prefix
     },