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How to Query an NTP Server using C#?
...ntry(ntpServer).AddressList;
//The UDP port number assigned to NTP is 123
var ipEndPoint = new IPEndPoint(addresses[0], 123);
//NTP uses UDP
using(var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp))
{
socket.Connect(ipEndPoint);
...
A semantics for Bash scripts?
...ion.
$ foo() { echo $x; }
$ bar() { local x; echo $x; }
$ foo
$ bar
$ x=123
$ foo
123
$ bar
$ …
Environment and process "scope"
Subshells inherit the variables of their parent shells, but other kinds of processes don't inherit unexported names.
$ x=123
$ ( echo $x )
123
$ bash -c 'echo $x'...
How do I connect to a MySQL Database in Python?
...1 - Setting
You must install a MySQL driver before doing anything. Unlike PHP, Only the SQLite driver is installed by default with Python. The most used package to do so is MySQLdb but it's hard to install it using easy_install. Please note MySQLdb only supports Python 2.
For Windows user, you can...
App Inventor 2 能否实现后台推送通知？源码级深度调研 - App应用开发 - 清...
...推送。需要 App 保持运行。
2.3 NotificationStyle 扩展（fun123 自研）
源码位置：components/src/cn/fun123/NotificationStyle/NotificationStyle.java
核心能力：创建 NotificationChannel、构建 Notification 并通过 NotificationManager 显示、支持多种样式（...
为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
...已下载好的工程源码，关注页面底部公众号（或搜索“fun123cn”关注），回复“源码”即可免费下载。
代码编写
采用自己较为熟悉的java开发环境就行，这里推荐使用VSCode，拓展目录在 appinventor-sources/appinventor/...
Socket.IO Authentication
...
This article (http://simplapi.wordpress.com/2012/04/13/php-and-node-js-session-share-redi/) shows how to
store sessions of the HTTP server in Redis (using Predis)
get these sessions from Redis in node.js by the session id sent in a cookie
Using this code you are able to get t...
Check whether variable is number or string in JavaScript
...constructors, you can use typeof:.
typeof "Hello World"; // string
typeof 123; // number
If you're creating numbers and strings via a constructor, such as var foo = new String("foo"), you should keep in mind that typeof may return object for foo.
Perhaps a more foolproof method of che...
jQuery document.createElement equivalent?
...lease notice that a is a jQuery object while b is a html element:
a.html('123')
// [<div>123</div>]
b.html('123')
// TypeError: Object [object HTMLDivElement] has no method 'html'
$(b).html('123')
// [<div>123</div>]
...
In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?
...ectly. Here's a good link to more symbols: danshort.com/HTMLentities/index.php?w=dingb
– Nathan Prather
Aug 26 '12 at 15:25
1
...
Unable to set data attribute using jQuery Data() API
...('#changeData').click(function() {
$('#foo').data('helptext', 'Testing 123');
// $('#foo').attr('data-helptext', 'Testing 123');
console.log($('#foo').data('data-helptext'));
return false;
});
See demo
Using the Chrome DevTools Console to inspect the DOM, the $('#foo').data('helptext...