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刘强东“一元年薪”背后的O2O棋局 - 资讯 - 清泛网 - 专注C/C++及内核技术
...电商未来的发展路线？
“现在应该是对线上线下的企业如何按照新的规则围绕互联网和用户运转下去的摸索状态。”唐兴通举个例子：以前超市只是卖东西，未来它可能还用于仓储；以前电商要做物流配送，未来它可能借助超...
Django rest framework nested self-referential objects
...ution works but the count output of my serializer is wrong. It only counts root nodes. Any ideas? It's the same with djangorestframework-recursive.
– Lucas Veiga
May 3 '17 at 1:29
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Sort points in clockwise order?
...
+1: No atan(), no square root, and even no divisions. This is a good example of computer graphics thinking. Cull off all the easy cases as soon as possible, and even in the hard cases, compute as little as possible to know the required answer.
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How to check if a process id (PID) exists
...wo ways:
Lets start by looking for a specific application in my laptop:
[root@pinky:~]# ps fax | grep mozilla
3358 ? S 0:00 \_ /bin/sh /usr/lib/firefox-3.5/run-mozilla.sh /usr/lib/firefox-3.5/firefox
16198 pts/2 S+ 0:00 \_ grep mozilla
All examples now will look...
Given two directory trees, how can I find out which files differ by content?
...les in subdirs, for example rsync --options /usr /bin /var /sbin /lib /old_root will effectively compare current root / (by specifying all subdirs in it) and /old_root (containing for example some older backup of /), which is something diff -r can't do. And if you assume that files with same size, ...
Using Node.js only vs. using Node.js with Apache/Nginx
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Not having to worry about privileges/setuid for the Node.js process. Only root can bind to port 80 typically. If you let nginx/Apache worry about starting as root, binding to port 80, and then relinquishing its root privileges, it means your Node app doesn't have to worry about it.
Serving static f...
Convert timestamp to readable date/time PHP
...nto a timestamp. You want to do the opposite, which is date. The typical mysql date format is date('Y-m-d H:i:s'); Check the manual page for what other letters represent.
If you have a timestamp that you want to use (apparently you do), it is the second argument of date().
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Memcache Vs. Memcached [duplicate]
...derstanding that memcacheD has the ability work at the database layer with MySQL commands. That way, your code doesn't have to even call special caching methods. It's all completed in the database?
– user1003932
Oct 17 '12 at 0:42
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Make Iframe to fit 100% of container's remaining height
...;
padding: 0px;
}
/* iframe's parent node */
div#root {
position: fixed;
width: 100%;
height: 100%;
}
/* iframe itself */
div#root > iframe {
display: block;
width: 100%;
height: 100%;
border...
How to generate XML file dynamically using PHP?
...5)
and we have to append this in the correct position. We are creating the root so we append this directly to the domdocument.
Note create element append the element to the node and return the node inserted, we save this reference to append the track nodes to the root node (incidentally called xml)....