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SQL Server NOLOCK and joins
...ll lock hints are propagated to all the tables and views that are accessed by the query plan, including tables and views referenced in a view. Also, SQL Server performs the corresponding lock consistency checks.
[SQL Server 2005]
In SQL Server 2005, all lock hints are propagated to all the tables an...
Java Delegates?
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Not really, no.
You may be able to achieve the same effect by using reflection to get Method objects you can then invoke, and the other way is to create an interface with a single 'invoke' or 'execute' method, and then instantiate them to call the method your interested in (i.e. usin...
Django: How to manage development and production settings?
... use a bootstrap script or a process manager to load the correct settings (by setting the environment), or just run it from your shell before starting Django: export DJANGO_SETTINGS_MODULE=myapp.production_settings.
Note that you can run this export at any time from a shell — it does not need to ...
java.net.SocketException: Connection reset
...but it is not unknown for commercial software.
More commonly, it is caused by writing to a connection that the other end has already closed normally. In other words an application protocol error.
It can also be caused by closing a socket when there is unread data in the socket receive buffer.
In Win...
Iterate over the lines of a string
...ike splitlines are implemented in very fast ways; putting strings together by programming at a very low level (esp. by loops of += of very small pieces) can be quite slow.
Edit: added @Jacob's proposal, slightly modified to give the same results as the others (trailing blanks on a line are kept), i...
Immutable vs Mutable types
...'bar'
print s # foobar
The value of the variable changes, but it changes by changing what the variable refers to. A mutable type can change that way, and it can also change "in place".
Here is the difference.
x = something # immutable type
print x
func(x)
print x # prints the same thing
x = som...
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is no
...e or running. When the problem occurs you can identify any blocked process by the process state. If you right-click on the process and select details it'll show you the last query executed by the process.
The second issue will cause the database to use a sub-optimal query plan. It can be resolved b...
Android accelerometer accuracy (Inertial navigation)
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You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice.
Here is an explanation why (Google Tech Talk) at 23:20. I highly recommend this video.
It is not the accelerometer noise tha...
How do I edit an existing tag message in git?
...f -m "<new message>"
This will create a new tag with the same name (by overwriting the original).
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Difference between Rebuild and Clean + Build in Visual Studio
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For a multi-project solution, "rebuild solution" does a "clean" followed by a "build" for each project (possibly in parallel). Whereas a "clean solution" followed by a "build solution" first cleans all projects (possibly in parallel) and then builds all projects (possibly in parallel). This differ...