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NASM x86汇编入门指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...write”系统调用做了些什么，输入 man 2 write并按回车，将显示write帮助手册，2表示从手册的第二段开始查找
在NAME段下面是函数的名称和功能-例如：
write – write to a file descriptor
你可能会感到意外，为什么会这样？没错，在l...
What are the security risks of setting Access-Control-Allow-Origin?
...@Gumbo What about static content? (e.g. static cdn content, such as javascripts, css, static htmls etc.) Are there any security issues of setting Access-Control-Allow-Origin: * on them? There will be no nogin etc, they are public to everyone?
– Umut Benzer
Jun ...
What is the usefulness of `enable_shared_from_this`?
...p == q);
assert(!(p < q || q < p)); // p and q must share ownership
}
The method f() returns a valid shared_ptr, even though it had no member instance. Note that you cannot simply do this:
class Y: public enable_shared_from_this<Y>
{
public:
shared_ptr<Y> f()
{
...
Git serve: I would like it that simple
... it down and start it back up too fast.
You can put this into a batch script with an easy to remember name like "gitserve", so you don't need to type it all out again. As suggested in some of the comments, in recent versions of Git you can add an alias to the Git config:
[alias]
serve = !git...
How to wait in a batch script? [duplicate]
I am trying to write a batch script and trying to wait 10 seconds between 2 function calls. The command:
6 Answers
...
Fastest Way to Serve a File Using PHP
...f_symlink);
Obviously you'll need a way to prune them either when the script to create them is called or via cron (on the machine if you have access or via some webcron service otherwise)
Under apache you need to be able to enable FollowSymLinks in a .htaccess or in the apache config.
Access con...
Is it possible to GROUP BY multiple columns using MySQL?
...red Dec 3 '09 at 17:14
Joe PhillipsJoe Phillips
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Do I need to heartbeat to keep a TCP connection open?
I have two components that that communicate via TCP/IP. Component A acts as a server/listener and Component B is the client. The two should communicate as quickly as possible. There can only ever be one connection at any time (though that is aside to this question). A senior developer at my comp...
浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以控制接收窗口的大小：
shell> sysctl -a | grep mem
net.ipv4.tcp_rmem = <MIN> <DEFAULT> <MAX>
如果我们出于传输性能的考虑，设置了一个足够大的缓冲，那么当大量请求同时到达时，内存会不会爆掉？通常不会，因为Linux本身有一个缓冲...
Downloading MySQL dump from command line
...backup.sql
You can even go as far as auto-compressing the output using gzip (if your DB is very big):
$ mysqldump -u [uname] -p db_name | gzip > db_backup.sql.gz
If you want to do this remotely and you have the access to the server in question, then the following would work (presuming the...