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Detect If Browser Tab Has Focus
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Yes, window.onfocus and window.onblur should work for your scenario:
http://www.thefutureoftheweb.com/blog/detect-browser-window-focus
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What's the difference between Task.Start/Wait and Async/Await?
...will pick a thread from thread pool (Thread1) and, this thread will make a http call. If you do Wait(), this thread will be blocked until http call resolves. While it is waiting, if UserB calls /getUser/2, then, app pool will need to serve another thread (Thread2) to make http call again. You just c...
Query EC2 tags from within instance
...magic endpoints you can use to get various bits of data. In this case curl http://169.254.169.254/latest/meta-data/instance-id gets your your instance ID
– Asfand Qazi
Jan 31 '19 at 11:51
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Moment js date time comparison
...'.result').text('Date is future');
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.3/moment.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<input type="text" name...
JSP tricks to make templating easier?
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I made quite easy, Django style JSP Template inheritance tag library.
https://github.com/kwon37xi/jsp-template-inheritance
I think it make easy to manage layouts without learning curve.
example code :
base.jsp : layout
<%@page contentType="text/html; charset=UTF-8" %>
<%@ taglib ur...
What is the best Battleship AI?
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Here's an opponent for people to play against:
http://natekohl.net/files/FarnsworthOpponent.cs
Instead of using a fixed geometry-inspired strategy, I thought it would be interesting to attempt to estimate the underlying probabilities that any particular unexplored space...
JSON to pandas DataFrame
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path1 = '42.974049,-81.205203|42.974298,-81.195755'
request=Request('http://maps.googleapis.com/maps/api/elevation/json?locations='+path1+'&sensor=false')
response = urlopen(request)
elevations = response.read()
data = json.loads(elevations)
df = pd.json_normalize(data['results'])
This gi...
Instantiating object of type parameter
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If you're willing to subclass you can avoid erasure as well, check out
http://www.artima.com/weblogs/viewpost.jsp?thread=208860
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地图组件（高德地图） · App Inventor 2 中文网
...每个块对应一个特定的URL。
默认高德地图简图模式：https://wprd01.is.autonavi.com/appmaptile?x={x}&y={y}&z={z}&style=7
可调整地图样式，变量说明如下：
域名前缀(wprd,webst)：效果一样，目前还没有找出规律。01 ~ 04 随意都可以，负载均衡...
Rails formatting date
...hich provides you a way to present the string representation of the date. (http://ruby-doc.org/core-2.2.1/Time.html#method-i-strftime).
From APIdock:
%Y%m%d => 20071119 Calendar date (basic)
%F => 2007-11-19 Calendar date (extended)
%Y...