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What's the difference between using CGFloat and float?
...d to use CGFloat all over the place, but I wonder if I get a senseless "performance hit" with this. CGFloat seems to be something "heavier" than float, right? At which points should I use CGFloat, and what makes really the difference?
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Qt: can't find -lGL error
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@Cuadue: The GL in the error and in libgl1-... is for OpenGL, a fundamental dependency of Qt 5.x. This is a common error for devs when setting up for Qt development -- but once they install the OpenGL development lib they never see it again.
– pixelgrea...
GCC dump preprocessor defines
Is there a way for gcc/g++ to dump its preprocessor defines from the command line?
I mean things like __GNUC__ , __STDC__ , and so on.
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django urls without a trailing slash do not redirect
...sed if CommonMiddleware is installed...". I prefer Michael Gendin's answer for a cleaner solution.
– Wtower
Feb 11 '15 at 9:26
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Replacing some characters in a string with another character
... the option. Of course, this is equivalent to tr -s xyz _ so no real need for sed here.
– tripleee
Jul 26 '16 at 3:57
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python: Change the scripts working directory to the script's own directory
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I think you're right about separating code and data for large software packages, but it seems quite far-fetched for a small maintenance script. I totally agree about the version control.
– Adam Matan
Sep 16 '09 at 14:04
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Flask-SQLAlchemy import/context issue
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Can you do that multiple times? For example if I have more than one models.py file?
– Brad Wright
Mar 14 '12 at 6:50
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How does functools partial do what it does?
... is always substituted by 4, so that partial(sum2, 4)(2) == sum2(4, 2)
As for why it's needed, there's a variety of cases. Just for one, suppose you have to pass a function somewhere where it's expected to have 2 arguments:
class EventNotifier(object):
def __init__(self):
self._listene...
Where in a virtualenv does the custom code go?
...hat sort of directory structure should one follow when using virtualenv ? For instance, if I were building a WSGI application and created a virtualenv called foobar I would start with a directory structure like:
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Installing Python packages from local file system folder to virtualenv with pip
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I am pretty sure that what you are looking for is called --find-links option.
Though you might need to generate a dummy index.html for your local package index which lists the links to all packages. This tool helps:
https://github.com/wolever/pip2pi
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