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What are best practices that you use when writing Objective-C and Cocoa? [closed]
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This is a great reference for someone comming from C++, where I did most of the things you advise against.
– Clinton Blackmore
Jul 31 '09 at 23:17
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How can I update a single row in a ListView?
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I found the answer, thanks to your information Michelle.
You can indeed get the right view usi...
Fast check for NaN in NumPy
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In []: x= rand(1e5)
In []: %timeit isnan(x.min())
10000 loops, best of 3: 200 us per loop
In []: %timeit isnan(x.sum())
10000 loops, best of 3: 169 us per loop
In []: %timeit isnan(dot(x, x))
10000 loops, best of 3: 134 us per loop
In []: x[5e4]= NaN
In []: %timeit isnan(x.min())
100 loops, best o...
Are nested HTML comments possible?
...pec.
Here's an excellent article that explains it:
http://weblog.200ok.com.au/2008/01/dashing-into-trouble-why-html-comments.html
Long answer: Why we get it wrong
Most of us who grew up with HTML (without delving into the SGML that underlies it)) have come to believe that the string <...
How to remove specific elements in a numpy array
...mpress(a, [i not in index for i in range(len(a))])))"
10 loops, best of 3: 200 msec per loop
python -m timeit -s "import numpy as np" -s "a = np.array(list(range(10000)))" -s "index=[i for i in range(10000) if i % 2 == 0]" "np.delete(a, index)"
1000 loops, best of 3: 1.68 msec per loop
Obviously,...
What do the terms “CPU bound” and “I/O bound” mean?
...chmark code:
POSIX C pthread source code used in the graph.
And here is a C++ version that produces analogous results.
plot script
I don't know enough computer architecture to fully explain the shape of the curve, but one thing is clear: the computation does not become 8x faster as naively expec...
Why does pycharm propose to change method to static
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PyCharm "thinks" that you might have wanted to have a static method, but you forgot to declare...
How to make a in Bootstrap look like a normal link in nav-tabs?
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As noted in the official documentation, simply apply the class(es) btn btn-link:
<!-- Deem...
Generating random strings with T-SQL
...you use this make sure you read this: blogs.msdn.com/b/oldnewthing/archive/2008/06/27/8659071.aspx - Note GUID is Microsoft's implementation of UUID, regardless the point is as ooxi mentioned, you need to be careful how you chop up the UUID.
– Clarence Liu
May ...
PHP validation/regex for URL
... url is real because the above operation is expensive - perhaps as much as 200 milliseconds depending on file size. In some cases the url may not actually have a resource at its location available yet (e.g. creating a url to an image that has yet to be uploaded). Additionally you're not using a ca...