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What is a memory fence?
... How does it influence the flow of the reordering? When you said, Alpha is known for being the weakest, why weakest? Is not it better that, it reorder more, so as result it will be much faster execution? (I am not alpha user, but asking about the effect of very reordering vs restricted ...
Which Boost features overlap with C++11?
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@ildjarn: Boost.Chrono provides much more functions than <chrono>. Boost.Exception — only N2179 is relevant.
– kennytm
Jan 13 '12 at 18:41
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Where to place $PATH variable assertions in zsh?
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Regarding my comment
In my comment attached to the answer kev gave, I said:
This seems to be incorrect - /etc/profile isn't listed in any zsh documentation I can find.
This turns out to be partially incorrect: /etc/profile may be sourced by zsh. However, this only occurs if zsh is "invoked ...
What exactly is Python's file.flush() doing?
...uage that you're programming against and is meant to speed things up by avoiding system calls for every write. Instead, when you write to a file object, you write into its buffer, and whenever the buffer fills up, the data is written to the actual file using system calls.
However, due to the operat...
Purpose of ESI & EDI registers?
...ations you can only do with DI/SI (or their extended counterparts, if you didn't learn ASM in 1985). Among these are
REP STOSB
REP MOVSB
REP SCASB
Which are, respectively, operations for repeated (= mass) storing, loading and scanning. What you do is you set up SI and/or DI to point at one or bot...
B-Tree vs Hash Table
...ed in. These objects are looped over again to really find the right one inside this partition.
So if you have small sizes you have a lot of overhead for small elements, big sizes result in further scanning.
Todays hash tables algorithms usually scale, but scaling can be inefficient.
There are indee...
Output array to CSV in Ruby
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@David it's the file mode. "w" means write to a file. If you don't specify this, it'll default to "rb" (read-only binary mode) and you would get an error when trying to add to your csv file. See ruby-doc.org/core-1.9.3/IO.html fo...
Putting text in top left corner of matplotlib plot
...import matplotlib.pyplot as plt
# Build a rectangle in axes coords
left, width = .25, .5
bottom, height = .25, .5
right = left + width
top = bottom + height
ax = plt.gca()
p = plt.Rectangle((left, bottom), width, height, fill=False)
p.set_transform(ax.transAxes)
p.set_clip_on(False)
ax.add_patch(p)...
How to track down log4net problems
... one thing I've never figured out is how to tell what's going on on the inside. For example, I've got a console appender and a database appender in my project. I made a few changes to the database and the code, and now the database appender doesn't work anymore. I'll figure out why eventually, but i...
Is there any way in C# to override a class method with an extension method?
There have been occasions where I would want to override a method in a class with an extension method. Is there any way to do that in C#?
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