大约有 42,000 项符合查询结果（耗时：0.0585秒） [XML]
Sort points in clockwise order?
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+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...
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...
SEH stack 结构探索（1）--- 从 SEH 链的最底层（线程第1个SEH结构）说起 -...
...TION_RECORD，即构造一个最底层的 SEH 结点
我们要看的是它如何构建 _EXCEPTION_REGISTRATION_RECORD 结构，我们最好准备纸笔记录下它的 stack 变化情况
1. ntdll32!_SEH_prolog4() 构造的 stack 结构
刚进入 ntdll32!_SEH_prolog4() 时的 stack 是下面的...
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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译文：理解Java中的弱引用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...方面的专家，但是我认为至少你应该了解什么是弱引用，如何使用它们，并且什么场景使用。既然它们是一些不知名的概念，我简单就着前面的三个问题来说明一下。
强引用(Strong Reference)
强引用就是我们经常使用的引用，其...
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)....