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Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
...16) | (x << 16));
}
From the famous Bit Twiddling Hacks page:
Fastest (lookup table):
static const unsigned char BitReverseTable256[] =
{
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0...
node.js hash string?
...es for each algorithm. It may take around 1-15 seconds for each algorithm (Tested on the Standard Google Computing Engine with Node.js 4.2.2).
for(var i1=0;i1<crypto.getHashes().length;i1++){
var Algh=crypto.getHashes()[i1];
console.time(Algh);
for(var i2=0;i2<1000000;i2++){
crypto....
Convert SVG image to PNG with PHP
...n just place it in a loop and convert loads of SVGs,
import os
svgs = ('test1.svg', 'test2.svg', 'etc.svg')
for svg in svgs:
os.system('java -jar batik-rasterizer.jar -m image/jpeg -q 0.8 '+str(svg)+'.svg')
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C# Create New T()
...Instance(typeof(T), signature, args); see msdn.microsoft.com/en-us/library/4b0ww1we.aspx for more detail.
– Chris Baxter
Jun 30 '11 at 4:09
...
How to implement the Java comparable interface?
...evisited.blogspot.com/2011/11/how-to-override-compareto-method-in.html#ixzz4B4EMGha3
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PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
...
Perfect! I tested it with 10 chars as length. 100000 tokens and still no duplicates!
– Sharpless512
Feb 26 '14 at 8:13
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What is the ideal data type to use when storing latitude / longitude in a MySQL database?
... this for a navigation database built from ARINC424 I did a fair amount of testing and looking back at the code, I used a DECIMAL(18,12) (Actually a NUMERIC(18,12) because it was firebird).
Floats and doubles aren't as precise and may result in rounding errors which may be a very bad thing. I can't...
In the shell, what does “ 2>&1 ” mean?
...
echo test > afile.txt
redirects stdout to afile.txt. This is the same as doing
echo test 1> afile.txt
To redirect stderr, you do:
echo test 2> afile.txt
>& is the syntax to redirect a stream to another file...
Calculate RSA key fingerprint
...-agent tcsh
(or another shell you use).
Load the private key you want to test:
$ ssh-add /path/to/your-ssh-private-key
You will be asked to enter the passphrase if the key is password-protected.
Now, as others have said, type
$ ssh-add -l
1024 fd:bc:8a:81:58:8f:2c:78:86:a2:cf:02:40:7d:9d:3c yo...
Eclipse's Ctrl+click in Visual Studio?
...on" by Noah Richards.
http://visualstudiogallery.msdn.microsoft.com/en-us/4b286b9c-4dd5-416b-b143-e31d36dc622b
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