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SQL order string as number
...r order by part of a field something like 'tensymbols13', 'tensymbols1222' etc.
ORDER BY CONCAT( REPEAT( "0", 18 - LENGTH( LEFT( stringfield , 10 ) ) ) , LEFT( stringfield , 10 ) )
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What's the simplest way to test whether a number is a power of 2 in C++?
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so basically (n>0 && ((n & (n-1)) == 0))
– Saurabh Goyal
Jul 10 '16 at 8:06
1
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eval command in Bash and its typical uses
...u need to construct a longer command containing operators, reserved words, etc.
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Sending command line arguments to npm script
... a parsing library like yargs or minimist; nodejs exposes process.argv globally, containing command line parameter values, but this is a low-level API (whitespace-separated array of strings, as provided by the operating system to the node executable).
Edit 2013.10.03: It's not currently possible...
Unique constraint on multiple columns
...ied from technet's documentation, is in the form of:
CONSTRAINT constraint_name UNIQUE [ CLUSTERED | NONCLUSTERED ]
(
column [ ASC | DESC ] [ ,...n ]
)
Therefore, the resuting table definition would be:
CREATE TABLE [dbo].[user](
[userID] [int] IDENTITY(1,1) NOT NULL,
[fcode] [int] ...
Making an array of integers in iOS
...rays are such a hassle for anything but trivial, one-off use that it's actually less trouble to wrap any arrays you plan on keeping around as NSArrays of NSNumber.
– Chuck
Jul 27 '10 at 1:58
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Why should hash functions use a prime number modulus?
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Usually a simple hash function works by taking the "component parts" of the input (characters in the case of a string), and multiplying them by the powers of some constant, and adding them together in some integer type. So for e...
Loop code for each file in a directory [duplicate]
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Try GLOB()
$dir = "/etc/php5/*";
// Open a known directory, and proceed to read its contents
foreach(glob($dir) as $file)
{
echo "filename: $file : filetype: " . filetype($file) . "<br />";
}
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How do I force a favicon refresh?
...in www.yoursite.com/favicon.ico (or www.yoursite.com/apple-touch-icon.png, etc.)
Push enter
ctrl+f5
Restart Browser (IE, Firefox)
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In C# what is the difference between a destructor and a Finalize method in a class?
...nmanaged recources in the dispose
method like database connection, files etc. The class implementing
dispose method should implement IDisposable interface.A Dispose method
should call the GC.SuppressFinalize method for the object it is
disposing if the class has desturctor because it has alr...