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What is the official “preferred” way to install pip and virtualenv systemwide?
...ons. In the case of most debian packages, I would assume (someone can feel free to correct me here) that they simply untar and provide a top level package.
For example, say the package is "virtualenv", you'd end up with /usr/lib/python2.x/site-packages/virtualenv. If you install it with easy_insta...
What are the default access modifiers in C#?
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Feel free to edit if you are confident in your understanding. I no longer know C#...
– Ben Aston
Sep 18 at 11:55
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How can I select rows with most recent timestamp for each key value?
...D, timestamp;
I acually use this more than correlated sub-queries. Feel free to bust me in the comments over effeciancy, I'm not too sure how it stacks up in that regard.
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ggplot2 keep unused levels barplot
... geom_bar(position="dodge", stat="identity") + facet_wrap( ~ plot, scales="free")
Results in this:
The last one is the most informative as space is taken up by the categories there count = 0
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How to convert OutputStream to InputStream?
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@DennisCheung yeah, of course. Nothing's free, but it's certainly going to be smaller than a 15MB copy. Optimizations would include using a thread pool instead to reduce the GC churn with constant thread/object creation.
– mikeho
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warning about too many open figures
...ing snippet solved the issue for me:
class FigureWrapper(object):
'''Frees underlying figure when it goes out of scope.
'''
def __init__(self, figure):
self._figure = figure
def __del__(self):
plt.close(self._figure)
print("Figure removed")
# .....
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What is the runtime performance cost of a Docker container?
...y deep set of filesystems will be particularly expensive), but they're not free. On the other hand, a great deal of Docker's functionality -- being able to build guests off other guests in a copy-on-write manner, and getting the storage advantages implicit in same -- ride on paying this cost.
DNAT g...
Why should I declare a virtual destructor for an abstract class in C++?
...delete on a pointer to it (or if it says so in its documentation), you are free to not declare a virtual destructor.
You can forbid clients to call delete on a pointer to it by making its destructor protected. Working like this, it is perfectly safe and reasonable to omit a virtual destructor.
Yo...
Using the Underscore module with Node.js
...e's command line mode) uses the "_" to hold the last result BUT on you are free to use it on your code files and it will work without a problem by doing the standard:
var _ = require('underscore');
Happy coding!
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In log4j, does checking isDebugEnabled before logging improve performance?
...ased log methods is that you can pass some Object(s) (which is essentially free), and the logger will call toString() only if required.
– SusanW
Feb 2 '17 at 14:00
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