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How to convert CFStringRef to NSString?
...n objects with +1 reference counts, meaning that they need to be released (all CF[Type]Create format functions do this).
The nice thing is that in Cocoa you can safely use autorelease or release to free them up.
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How to make an OpenGL rendering context with transparent background?
Rendering contexts usually have a solid color on the background (black or whatever, see the image below):
9 Answers
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How to dynamically load a Python class
...hing like this won't work:
__import__('foo.bar.baz.qux')
You'd have to call the above function like so:
my_import('foo.bar.baz.qux')
Or in the case of your example:
klass = my_import('my_package.my_module.my_class')
some_object = klass()
EDIT: I was a bit off on this. What you're basicall...
undefined reference to boost::system::system_category() when compiling
...raries. I have the 1.46-dev Boost libraries from the Ubuntu Repository installed, but I get an error when compiling the program.
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Counting array elements in Python [duplicate]
... in an array, because contrary to logic array.count(string) does not count all the elements in the array, it just searches for the number of occurrences of string.
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Why is there no xrange function in Python3?
...Some performance measurements, using timeit instead of trying to do it manually with time.
First, Apple 2.7.2 64-bit:
In [37]: %timeit collections.deque((x for x in xrange(10000000) if x%4 == 0), maxlen=0)
1 loops, best of 3: 1.05 s per loop
Now, python.org 3.3.0 64-bit:
In [83]: %timeit collec...
What is the iPad user agent?
... This answer is incorrect. From iOS 13 there is now no mention of iPad at all.
– CpnCrunch
Dec 16 '19 at 18:51
See th...
Declare and initialize a Dictionary in Typescript
... Very helpful sample code. The "interface IDictionary" contains a small typo, as there is a reference to IPerson.
– mgs
Apr 9 '13 at 5:31
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mysql_config not found when installing mysqldb python interface
...the linux server I'm connected to via ssh. The script uses mysqldb. I have all the other components I need, but when I try to install mySQLdb via setuptools like so:,
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Why does running the Flask dev server run itself twice?
...g is the library that supplies Flask with the development server when you call app.run().
See the restart_with_reloader() function code; your script is run again with subprocess.call().
If you set use_reloader to False you'll see the behaviour go away, but then you also lose the reloading function...