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Getting a random value from a JavaScript array
...s to performance optimization while producing output using UI elements, ~~ wins the game. MORE INFO
var rand = myArray[~~(Math.random() * myArray.length)];
But if you know that the array is going to have millions of elements than you might want to reconsider between Bitwise Operator and Math.Floor(...
Is floating-point math consistent in C#? Can it be?
...nd this rather hard to do. For some operations intermediate integers of 128bit would be useful. But .net doesn't offer such a type.
Implement a custom 32 bit floatingpoint. The lack of a BitScanReverse intrinsic causes a few annoyances when implementing this. But currently I think this is the most p...
How can I use optional parameters in a T-SQL stored procedure?
...is good as far as it goes but fails to fully follow up on one of his early bits of advice;
..., ignore compact code, ignore worrying about repeating code, ...
If you are looking to achieve the best performance then you should write a bespoke query for each possible combination of optional crit...
Calculate size of Object in Java [duplicate]
...et a reference to the sun.misc.Unsafe object.
private static final int NR_BITS = Integer.valueOf(System.getProperty("sun.arch.data.model"));
private static final int BYTE = 8;
private static final int WORD = NR_BITS/BYTE;
private static final int MIN_SIZE = 16;
public static int sizeOf(Class src)...
How do I create 7-Zip archives with .NET?
... {
Int32 dictionary = 1 << 23;
Int32 posStateBits = 2;
Int32 litContextBits = 3; // for normal files
// UInt32 litContextBits = 0; // for 32-bit data
Int32 litPosBits = 0;
// UInt32 litPosBits = 2; // for 32-bit data
...
“unrecognized import path” with go get
...'t hit /usr/local/go/bin. Also, should note that the ubuntu packages are a bit behind the official release, which is 1.2.
– JimB
Dec 9 '13 at 15:08
2
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Measuring elapsed time with the Time module
...me unit with gmtime is seconds. If you need microseconds consider the following:
import datetime
start = datetime.datetime.now()
# some code
end = datetime.datetime.now()
elapsed = end - start
print(elapsed)
# or
print(elapsed.seconds,":",elapsed.microseconds)
strftime documentation
...
configure Git to accept a particular self-signed server certificate for a particular https remote
...tton I got exactly the same file, as created using openssl.
Note: I was a bit surprised, there is no name of the authority visibly mentioned. This is fine.
Having the trusted certificate in dedicated file
Previous steps shall result in having the certificate in some file. It does not matter, what...
Why is the Windows cmd.exe limited to 80 characters wide?
... love stretching my terminal on unix. What is the history or reason behind windows lame command line?
14 Answers
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jQuery.click() vs onClick
...jQuery vs Native Element Performance.
I've done a test in Firefox 16.0 32-bit on Windows Server 2008 R2 / 7 64-bit
$('span'); // 6,604 operations per second
document.getElementsByTagName('span'); // 10,331,708 operations/sec
For click events, check Native Browser events vs jquery trigger or jQue...