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Is it possible to GROUP BY multiple columns using MySQL?
...red Dec 3 '09 at 17:14
Joe PhillipsJoe Phillips
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Android emulator failed to allocate memory 8
...ions/7222906/failed-to-allocate-memory-8
– Juha Palomäki
Oct 7 '13 at 12:55
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Putting uncommitted changes at Master to a new branch by Git
...ch. You can try checkout -m to merge.
– Jouni K. Seppänen
Nov 4 '10 at 14:00
2
I tried this but ...
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...
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...
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...
Xcode iOS 8 Keyboard types not supported
...ven with sizeToFit I get the same warning.
– Nuno Gonçalves
Sep 28 '15 at 13:50
I'd need to see your code to see if I...
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...
Why em instead of px?
...site look good in 16pt font as well as 48pt font.
– Lèse majesté
Aug 3 '12 at 16:16
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@Lesemaje...
How do you check whether a number is divisible by another number (Python)?
...ts. I've done that for you for this time.
– Jean-François Fabre♦
Jan 4 '17 at 21:17
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