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How to get all files under a specific directory in MATLAB?
...rtrim(cmdout));
toc
% Elapsed time is 0.603163 seconds.
Positive:
Very fast (in my case for a database of 18000 files on linux).
You can use well tested solutions.
You do not need to learn or reinvent a new syntax to select i.e. *.wav files.
Negative:
You are not system independent.
You rely...
Hidden features of C
...on pointers. You can use a table of function pointers to implement, e.g., fast indirect-threaded code interpreters (FORTH) or byte-code dispatchers, or to simulate OO-like virtual methods.
Then there are hidden gems in the standard library, such as qsort(),bsearch(), strpbrk(), strcspn() [the latt...
How to set initial size of std::vector?
...tor<CustomClass*> and I put a lot of items in the vector and I need fast access, so I don't use list. How to set initial size of vector (for example to be 20 000 places, so to avoid copy when I insert new)?
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How to document thrown exceptions in c#/.net
...nes you don't know about you want to let go. Its the principal of failing fast--better your app to crash than enter a state where you might end up corrupting your data. The crash will tell you about what happened and why, which may help move that exception out of the "ones you don't know about" li...
Should you always favor xrange() over range()?
...oth Python 2 and Python 3, you can't use xrange().
range() can actually be faster in some cases - eg. if iterating over the same sequence multiple times. xrange() has to reconstruct the integer object every time, but range() will have real integer objects. (It will always perform worse in terms of...
Asynchronous Requests with Python requests
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I tested both requests-futures and grequests. Grequests is faster but brings monkey patching and additional problems with dependencies. requests-futures is several times slower than grequests. I decided to write my own and simply wrapped requests into ThreadPoolExecutor and it was al...
How to test multiple variables against a value?
...very cheap to create and iterate over. On my machine at least, tuples are faster than sets so long as the size of the tuple is around 4-8 elements. If you have to scan more than that, use a set, but if you are looking for an item out of 2-4 possibilities, a tuple is still faster! If you can arran...
Is there a regular expression to detect a valid regular expression?
...this stack.
Russ Cox wrote "Regular Expression Matching Can Be Simple And Fast" which is a wonderful treatise on regex engine implementation.
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What are good uses for Python3's “Function Annotations”
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Fast-forward to 2015 , python.org/dev/peps/pep-0484 and mypy-lang.org are starting to prove all naysayers wrong.
– Mauricio Scheffer
Sep 23 '15 at 10:37
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Detect blocked popup in Chrome
...ad of onload, I would do $(myPopup).ready(). Running locally my IE was too fast, and "onload" had already occurred.
– Matt Connolly
Sep 10 '12 at 20:12
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