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Extract substring using regexp in plain bash
...ash
\s* any space characters (any whitespace character)
\( start capture group
\S* any non-space characters
\) end capture group
.*$ anything at the end
\1 substitute 1st capture group for everything on line
p print it
...
__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...会输出任何警告信息。
注意，默认情况下，编译器是能识别类似printf的“标准”库函数。
__attribute__ noreturn
该属性通知编译器函数从不返回值，当遇到类似函数需要返回值而却不可能运行到返回值处就已经退出来的情况，该...
【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...事情非常多，比如具体选择哪个射频通道进行通信，怎么识别空中数据包，具体在哪个时间点把数据包发送出去，怎么保证数据的完整性，ACK如何接收，如何进行重传，以及如何对链路进行管理和控制等等。LL层只负责把数据发...
How do I get an apk file from an Android device?
How do I get the apk file from an android device? Or how do I transfer the apk file from device to system?
24 Answers
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淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...数据层可以给数据打上特殊的标来区分。目的都是把已经识别出来的热点和普通请求区分开来。
动静分离
前面介绍在系统层面上的原则是要做隔离，接下去就是要把热点数据进行动静分离，这也是解决大流量系统的一个重要...
Can someone explain the traverse function in Haskell?
...explain it to me in terms of an imperative loop? Pseudo-code would be much appreciated. Thanks.
5 Answers
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Explaining Apache ZooKeeper
...rying to understand ZooKeeper, how it works and what it does. Is there any application which is comparable to ZooKeeper?
5...
Which “href” value should I use for JavaScript links, “#” or “javascript:void(0)”?
...s an error. Hence the developers have to also remember to handle any error appropriately in the called function.
A third reason is that there are cases where the onclick event property is assigned dynamically. I prefer to be able to call a function or assign it dynamically without having to code t...
What's the difference between Application.ThreadException and AppDomain.CurrentDomain.UnhandledExcep
...
Application.ThreadException is specific to Windows Forms. Winforms runs event handlers in response to messages sent to it by Windows. The Click event for example, I'm sure you know them. If such an event handler throws an ...
Is there any NoSQL data store that is ACID compliant?
...lumes and performance.
ACID provides principles governing how changes are applied to a database. In a very simplified way, it states (my own version):
(A) when you do something to change a database the change should work or fail as a whole
(C) the database should remain consistent (this is a pret...