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How is a CRC32 checksum calculated?

... 1 0000 0100 1100 0001 0001 1101 1011 0111 The highest term (x32) is usually not explicitly written, so it can instead be represented in hex just as 0x 04 C1 1D B7 Feel free to count the 1s and 0s, but you'll find they match up with the polynomial, where 1 is bit 0 (or the first bit) and x ...
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Where can I learn how to write C code to speed up slow R functions? [closed]

...ds C++ and Rcpp to be much more like writing R than writing C++. YMMV and all that. share | improve this answer | follow | ...
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How to remove the querystring and get only the url?

...he querystring. explode() is less direct because it must produce a potentially two-element array by which the first element must be accessed. Some other techniques may break when the querystring is missing or potentially mutate other/unintended substrings in the url -- these techniques should be a...
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What is Bit Masking?

... the b to indicate binary literal is not supported by all compilers, correct? – Ungeheuer May 8 '17 at 23:37 ...
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How to get the error message from the error code returned by GetLastError()?

After a Windows API call, how can I get the last error message in a textual form? 11 Answers ...
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How do I disable “missing docstring” warnings at a file-level in Pylint?

... have a separate code for the various place where docstrings can occur, so all you can do is disable C0111. The problem is that if you disable this at module scope, then it will be disabled everywhere in the module (i.e you won't get any C line for missing function / class / method docstring. Which ...
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How to import a Python class that is in a directory above?

...on __file__ to find out the parent directory (a couple of os.path.dirname calls will do;-), then (if that directory is not already on sys.path) prepend temporarily insert said dir at the very start of sys.path, __import__, remove said dir again -- messy work indeed, but, "when you must, you must" (a...
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How to remove from a map while iterating it?

...= m.erase(it)" since C++11 } else { ++it; } } Note that we really want an ordinary for loop here, since we are modifying the container itself. The range-based loop should be strictly reserved for situations where we only care about the elements. The syntax for the RBFL makes this clear...
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lodash multi-column sortBy descending

...dash.com/docs#orderBy) in Lodash as of 4.3.0. The normal sort function is called _.sortBy(lodash.com/docs#sortBy) – Nidhin David Feb 12 '16 at 11:19 2 ...
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How to get the return value from a thread in python?

...ram in param_list] The order will be maintained, and exiting the with will allow result collection. [f.result() for f in futures] – jayreed1 Jun 4 at 21:29 ...