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Why is processing a sorted array faster than processing an unsorted array?
...+= ~t & data[c];
This eliminates the branch and replaces it with some bitwise operations.
(Note that this hack is not strictly equivalent to the original if-statement. But in this case, it's valid for all the input values of data[].)
Benchmarks: Core i7 920 @ 3.5 GHz
C++ - Visual Studio 2010 - ...
Text overwrite in visual studio 2010
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I am using Visual Studio 2013 and Win 8.1. It was Shift + 0 (0 is my insert key) on the number pad of my laptop.
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Passing parameters in rails redirect_to
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Michael SepcotMichael Sepcot
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How to send email attachments?
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answered Jul 29 '10 at 14:00
OliOli
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What is BSON and exactly how is it different from JSON?
... fast to encode and decode. For example, integers are stored as 32 (or 64) bit integers, so they don't need to be parsed to and from text. This uses more space than JSON for small integers, but is much faster to parse.
In addition to compactness, BSON adds additional data types unavailable in J...
How do I “source” something in my .vimrc file?
...:set yy bbbb4dw
The only file sourced by default is the .vimrc(_vimrc on windows) so that's a place you can keep all the commands you use to set up Vim every time.
Where it gets interesting is the fact that since a sourced file is just a series of commands, and sourcing is a command, you can sour...
How is a CRC32 checksum calculated?
...e 1s and 0s, but you'll find they match up with the polynomial, where 1 is bit 0 (or the first bit) and x is bit 1 (or the second bit).
Why this polynomial? Because there needs to be a standard given polynomial and the standard was set by IEEE 802.3. Also it is extremely difficult to find a polynom...
C/C++ maximum stack size of program
I want to do DFS on a 100 X 100 array. (Say elements of array represents graph nodes) So assuming worst case, depth of recursive function calls can go upto 10000 with each call taking upto say 20 bytes. So is it feasible means is there a possibility of stackoverflow?
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Python “SyntaxError: Non-ASCII character '\xe2' in file”
... this helped a lot! Still not sure what the charter is/was. I ended up throwing the code in notepad and saving as ASCII, and then pasting.
– KDecker
Feb 7 '14 at 23:32
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How can I create a temp file with a specific extension with .NET?
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@Pax: you have more chnace of winning the lottery 1000 times in a row than generating two idebtical guids. That's unique enough I guess...
– Mitch Wheat
Feb 24 '09 at 12:41
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