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Starting python debugger automatically on error

... You can use traceback.print_exc to print the exceptions traceback. Then use sys.exc_info to extract the traceback and finally call pdb.post_mortem with that traceback import pdb, traceback, sys def bombs(): a = [] print a[0] if __name__ == '...
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Create an array with same element repeated multiple times

...return a; } It doubles the array in each iteration, so it can create a really large array with few iterations. Note: You can also improve your function a lot by using push instead of concat, as concat will create a new array each iteration. Like this (shown just as an example of how you can wor...
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How to pinch out in iOS simulator when map view is only a portion of the screen?

...his did not work in my situation as one of the gray circles hovered over a table view on the bottom left causing the rows to be selected. – Christopher Jul 25 '12 at 22:08 2 ...
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Maven fails to find local artifact

Occasionally maven complains that a particular dependency, which is built and packaged locally, cannot be found in the local repository while building another project that has it as a dependency. We get an error like: ...
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Is using a lot of static methods a bad thing?

I tend to declare as static all the methods in a class when that class doesn't require to keep track of internal states. For example, if I need to transform A into B and don't rely on some internal state C that may vary, I create a static transform. If there is an internal state C that I want to be ...
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How to post data in PHP using file_get_contents?

...Sending an HTTP POST request using file_get_contents is not that hard, actually : as you guessed, you have to use the $context parameter. There's an example given in the PHP manual, at this page : HTTP context options (quoting) : $postdata = http_build_query( array( 'var1' => 'some...
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How to determine height of UICollectionView with FlowLayout

...y question: I was completely searching in the wrong place, digging through all the documentation I could find on UICollectionView. The simple and easy solution lies in the underlying layout: Just call collectionViewContentSize on your myCollectionView.collectionViewLayout property and you get the h...
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Calculate distance between 2 GPS coordinates

...y solution: #include <math.h> #include "haversine.h" #define d2r (M_PI / 180.0) //calculate haversine distance for linear distance double haversine_km(double lat1, double long1, double lat2, double long2) { double dlong = (long2 - long1) * d2r; double dlat = (lat2 - lat1) * d2r; ...
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How to install MySQLdb (Python data access library to MySQL) on Mac OS X?

... Update for those using Python3: You can simply use conda install mysqlclient to install the libraries required to use MySQLdb as it currently exists. The following SO question was a helpful clue: Python 3 ImportError: No module named 'ConfigParser' . Installing mysqlclient will install...
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What is the purpose of base 64 encoding and why it used in HTTP Basic Authentication?

...- it's an encoding. It's a way of representing binary data using only printable (text) characters. See this paragraph from the wikipedia page for HTTP Basic Authentication: While encoding the user name and password with the Base64 algorithm typically makes them unreadable by the naked eye, the...