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Subqueries vs joins
...es) the tuples can't be pruned out of the result set until the outer query starts to run.
With out seeing the the query its hard to say what was so bad about the original, but my guess would be it was something that the optimizer just couldn't make much better. Running 'explain' will show you th...
What part of Hindley-Milner do you not understand?
...
if somebody could at least tell me where to start looking to comprehend what this sea of symbols means
See "Practical Foundations of Programming Languages.", chapters 2 and 3, on the style of logic through judgements and derivations. The entire book is now available o...
I can not find my.cnf on my windows computer [duplicate]
...nfig file and add an entry like this:
[mysqld]
skip-grant-tables
Then restart the MySQL Service and you can log in and do what you need to do. Of course you want to disable that entry in the config file as soon as possible!
See also http://dev.mysql.com/doc/refman/5.7/en/resetting-permissions.h...
Standard Android menu icons, for example refresh [closed]
...just letting the OP know they should have been using local copies from the start, rather than by reference.
– DMags
Apr 7 '11 at 14:54
2
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将 App Inventor 2 项目连接到外部传感器 · App Inventor 2 中文网
...e motors for use, the method “SetupMotors” must be called when the app starts and the screen is initialized. Here is an example of how simple the new blocks are to use:
Tutorials
A tutorial for using the blocks has can be found here
Ports, Wiring, and API
For reference, the front right mo...
C# Stream流使用总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...务器：
TcpListener lis=new TcpListener(5000); //服务器监听
lis.Start();//启动
Socket sock=lis.AcceptSocket();//阻塞，直到有客户端连接
NetworkStream networkStream = new NetworkStream(sock);//得到Socket中的流
if (netStream.DataAvailable) //如果客户端发送了...
\r\n, \r and \n what is the difference between them? [duplicate]
... is there an actual use of \r\n ? I don't see how a line feed cannot start from its beginning. got an example?
– alp
May 27 at 18:52
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How to create GUID / UUID?
...(where he's only using 4 bits of the result and wasting the rest), you may start to wonder about performance. Indeed, joelpt even decided to toss out RFC for generic GUID speed with generateQuickGUID.
But, can we get speed and RFC compliance? I say, YES! Can we maintain readability? Well... No...
Undo git mv (rename)
...dentally renamed a large number of files and want to get back to where you started, delete all the renamed files that show up as adds under a git status call.
Once you delete all the changed files you can run git checkout -- * to get back the original file names locally.
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Print list without brackets in a single row
...veBennett can you please explain the slicing [1:-1] in your answer. I just started learning python. Thank you.
– Charan
Aug 2 '15 at 7:03
3
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