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libevent+protobuf轻松搭建tcpserver - C/C++ - 清泛网 - 专注C/C++及内核技术
...er(int port);
// client端socket流程:socket(),connect()，返回连接的sockfd
int create_io_channel(const char *ipaddr, int port);
2. 搭建TCP Server
下面以伪代码方式给出，错误处理省略
int main(int argc, char *argv[])
{
// 初始化
…
// event初始...
Why do people hate SQL cursors so much? [closed]
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The optimizer often cannot use the relational algebra to transform the problem when a cursor method is used. Often a cursor is a great way to solve a problem, but SQL is a declarative language, and there is a lot of information in the database, from constraints, to statistics and ...
Is there an MD5 Fixed Point where md5(x) == x?
Is there a fixed point in the MD5 transformation, i.e. does there exist x such that md5(x) == x ?
7 Answers
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How do I force git to use LF instead of CR+LF under windows?
...e.
If the "clear" script doesn't do anything, you will have (after commit) transformed your files, applying exactly the format you need them to follow.
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How to randomize (shuffle) a JavaScript array?
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Very nice. This is the Schwartzian transform in js.
– Mark Grimes
Jun 29 '18 at 10:43
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Why does document.querySelectorAll return a StaticNodeList rather than a real Array?
... update the result when you update the DOM. Anyway a very simple method to transform that result in a simple array is:
Array.prototype.slice.call(document.querySelectorAll(...));
and then you can do:
Array.prototype.slice.call(document.querySelectorAll(...)).map(...);
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How do I use the lines of a file as arguments of a command?
...t it. Should that be the case, you may need to use a non-shell language to transform the NUL-delimited content into an eval-safe form:
quoted_list() {
## Works with either Python 2.x or 3.x
python -c '
import sys, pipes, shlex
quote = pipes.quote if hasattr(pipes, "quote") else shlex.quote
prin...
Why catch and rethrow an exception in C#?
... another is when you are implementing an abstraction layer and you need to transform a provider-specific exception type (e.g. SqlException versus XmlException) into a more generic one (e.g. DataLoadingException).
– jammycakes
Oct 18 '10 at 12:14
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How to hide action bar before activity is created, and then show it again?
...depends on the Window Title to display itself - that is the ActionBar is a transformed Window Title.
So the trick which can help us out is to add one more thing to our Activity theme xml:
<item name="android:windowActionBar">false</item>
<item name="android:windowTitleSize">0dp<...
How do you rename a MongoDB database?
... @UDB Very likely preserved. "Renaming a collection" is a namespace transformation, essentially your collection named foo within the bar database has a namespace of bar.foo. The index on _id thus has the namespace bar.foo._id_. Renaming the collection (should) perform a prefix search and re...