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Why is it slower to iterate over a small string than a small list?
...OMPACT_DATA(op))
(which is also boring for similar reasons, assuming the macros (Something_CAPITALIZED) are all fast),
#define PyUnicode_READ(kind, data, index) \
((Py_UCS4) \
((kind) == PyUnicode_1BYTE_KIND ? \
((const Py_UCS1 *)(data))[(index)] : \
((kind) == PyUnicode_2...
What is the maximum length of a URL in different browsers?
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@DoubleGras Google Chrome for Mac does not allow me to paste a URL that long into my address bar
– Max Nanasy
May 27 '14 at 23:34
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Regular expression to match non-ASCII characters?
...n external libraries to recognize that "Αλφα" is a word, or even that "é" is a letter.
But so it goes.
This guy has written a good library for handling Unicode in Javascript Regexes:
http://blog.stevenlevithan.com/archives/javascript-regex-and-unicode
The Unicode stuff is a plugin to this ...
How do SO_REUSEADDR and SO_REUSEPORT differ?
...ffer the same options as BSD and they also behave the same way as in BSD.
macOS (MacOS X)
At its core, macOS is simply a BSD-style UNIX named "Darwin", based on a rather late fork of the BSD code (BSD 4.3), which was then later on even re-synchronized with the (at that time current) FreeBSD 5 code...
Python base64 data decode
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On Mac OS X, use cat base64-image.txt | base64 --decode > base64-image.png
– Mr-IDE
Jul 10 '17 at 9:38
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动态追踪（Dynamic Tracing）技术漫谈 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...很多工程师把它移植到其他的操作系统。比方说苹果的 Mac OS X 操作系统上就有 DTrace 的移植。其实近些年发布的每一台苹果笔记本或者台式机上面，都有现成的 dtrace 命令行工具可以调用，大家可以去在苹果机器的命令行终端上...
【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
... (msg->msg_flags&MSG_CONFIRM) //设置MSG_CONFIRM，表示确认ip地址到mac地址的映射不会过期，不用定时发送arp
goto do_confirm;
back_from_confirm:
saddr = fl4->saddr; //获取路由源地址
if (!ipc.addr) //如果选项中更没有指定目的地址，从路由中获取. ...