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Connect Java to a MySQL database
...attern for the DB connection is a bad approach. See among other questions: http://stackoverflow.com/q/9428573/. This is a #1 starters mistake.
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Creating a new dictionary in Python
...parently CPython 2.7 dict() is slower (6 times slower?), See: doughellmann.com/2012/11/… In any case I am starting to prefer the constructor syntax anyways since I find it easier to type and move code between dicts and function calls.
– David Wheaton
Mar 5 '1...
Append column to pandas dataframe
...eUploader: {
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Proper use of beginBackgroundTaskWithExpirationHandler
... to start the network operation. If you just want an existing operation to complete, as per @Eyal's question, you don't need to do anything in applicationDidEnterBackground
– Ashley Mills
Aug 3 '12 at 20:03
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Set environment variables on Mac OS X Lion
...path appended to the end of the PATH
I got these details from this post:
http://architectryan.com/2012/10/02/add-to-the-path-on-mac-os-x-mountain-lion/#.UkED3rxPp3Q
I hope that can help someone else
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C++ project organisation (with gtest, cmake and doxygen)
...e weird stuff you can find so it is not surprising that a lot
of questions come up. I'll try to walk through the questions one by one and mention some general things regarding building C++ libraries.
Separating headers and cpp files in directories. This is only
essential if you are building a compo...
Good ways to sort a queryset? - Django
...jango 1.4 and newer you can order by providing multiple fields.
Reference: https://docs.djangoproject.com/en/dev/ref/models/querysets/#order-by
order_by(*fields)
By default, results returned by a QuerySet are ordered by the ordering tuple given by the ordering option in the model’s Meta. You can...
Floating point vs integer calculations on modern hardware
... 6.342832
double mul: 6.321899
double div: 15.362536
This uses code from http://pastebin.com/Kx8WGUfg as benchmark-pc.c
g++ -fpermissive -O3 -o benchmark-pc benchmark-pc.c
I've run multiple passes, but this seems to be the case that general numbers are the same.
One notable exception seems to ...
IllegalStateException: Can not perform this action after onSaveInstanceState with ViewPager
...nceState(outState);
}
In the end the proper solution was (as seen in the comments) to use :
transaction.commitAllowingStateLoss();
when adding or performing the FragmentTransaction that was causing the Exception.
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Bash Templating: How to build configuration files from templates with Bash?
...he regex above should be... (\$\{[a-zA-Z_][a-zA-Z_0-9]*\}) stackoverflow.com/questions/304864/…
– Blue Waters
Jun 21 '12 at 7:44
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