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What is lexical scope?
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AraKAraK
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Why does volatile exist?
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Some processors have floating point registers that have more than 64 bits of precision (eg. 32-bit x86 without SSE, see Peter's comment). That way, if you run several operations on double-precision numbers, you actually get a higher-precision answer than if you were to truncate each interm...
Where is array's length property defined?
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84
Note also that ArrayList.size() provides the number of object actually stored in the array whereas myArray.length ([]) provides the "capaci...
Redefining NULL
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84
The C standard does not require null pointers to be at the machine's address zero. HOWEVER, cas...
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
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// Delay 2 seconds
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(2.0 * Double(NSEC_PER_SEC))), dispatch_get_main_queue()) { () -> Void in
println("Sum of times: \(time1 + time2)")
}
Objective C
CGFloat time1 = 3.49;
CGFloat time2 = 8.13;
// Delay 2 seconds
dispatch_after(...
CentOS 6.4下Squid代理服务器的安装与配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...：CentOS release 6.4 (Final)
Squid版本：squid-3.1.10-20.el6_5.3.x86_64
SELINUX=disabled
HTTP Service: stoped
三、安装Squid服务
3.1 检查squid软件是否安装
# rpm -qa|grep squid
3.2 如果未安装，则使用yum 方式安装
# yum -y install squid
3.3 设置开机自启动
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WebSockets vs. Server-Sent events/EventSource
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According to caniuse.com:
%96 of global users natively support WebSockets
%92 of global users natively support Server-sent events
You can use a client-only polyfill to extend support of SSE to many other browsers. This is less likely with WebSockets....
实战Nginx与PHP（FastCGI）的安装、配置与优化 - 更多技术 - 清泛网 - 专注...
...程数。根据官方建议，小于2GB内存的服务器，可以只开启64个进程，4GB以上内存的服务器可以开启200个进程。
<value name="max_children">5</value>
标签request_terminate_timeout用于设置FastCGI执行脚本的时间。默认是0s，也就是无限执行下...
Can I call an overloaded constructor from another constructor of the same class in C#?
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84
If you mean if you can do ctor chaining in C#, the answer is yes. The question has already been...
How does Python's super() work with multiple inheritance?
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What to do if these classes need different parameters to initialize themselves?
– calfzhou
May 8 '14...