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What is the use of Enumerable.Zip extension method in Linq?
...rator merges the corresponding elements of two sequences using a specified selector function.
var letters= new string[] { "A", "B", "C", "D", "E" };
var numbers= new int[] { 1, 2, 3 };
var q = letters.Zip(numbers, (l, n) => l + n.ToString());
foreach (var s in q)
Console.WriteLine(s);
Oupu...
完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
... if(!$_POST['tocatid']) showmessage(L('please_select_target_category'));
$tocatid = intval($_POST['tocatid']);
$modelid = $this->categorys[$tocatid]['modelid'];
if(!$modeli...
Storing Data in MySQL as JSON
... statement, including WHERE, ORDER BY, and GROUP BY clauses. This includes SELECT, UPDATE, DELETE, CREATE TABLE, and other SQL statements. The left hand side must be a JSON column identifier (and not an alias). The right hand side is a quoted JSON path expression which is evaluated against the JSON ...
How can I access the MySQL command line with XAMPP for Windows?
... The buffer size for TCP/IP and socket communication.
--select-limit=# Automatic limit for SELECT when using --safe-updates.
--max-join-size=# Automatic limit for rows in a join when using
--safe-updates.
--secure-auth Refuse client connecting ...
The provider is not compatible with the version of Oracle client
... or 64-bit Oracle Data Access Components (ODAC) Downloads) or you have to select according option in Oracle Universal Installer (OUI).
Note, when installing the Oracle Data Provider >= 12.1, then the provider is not automatically registered into GAC. You have to register it manually if needed,...
How do I associate file types with an iPhone application?
...n the Mac developer center, because this capability has been ported across from the Mac.
One of the UTIs used in the above example was system-defined, but the other was an application-specific UTI. The application-specific UTI will need to be exported so that other applications on the system can b...
Regex group capture in R with multiple capture-groups
...he capture group:
However, in order for this to work, you must explicitly select elements outside your capture group as mentioned in the gsub() help.
(...) elements of character vectors 'x' which are not substituted will be returned unchanged.
So if your text to be selected lies in the mi...
Randomize a List
...uffle();
The code above uses the much criticised System.Random method to select swap candidates. It's fast but not as random as it should be. If you need a better quality of randomness in your shuffles use the random number generator in System.Security.Cryptography like so:
using System.Security....
How to generate the JPA entity Metamodel?
...EE Developers") has its own metamodel generator integrated with Eclipse.
Select your project in the Package Explorer
Go to Properties -> JPA dialog
Select source folder from Canonical metamodel (JPA 2.0) group
Click Apply button to generate metamodel classes in the selected source folder
Th...
Fast Linux File Count for a large number of files
...
printf("%s contains %ld files\n", argv[1], count);
return 0;
}
From my testing without regard to cache, I ran each of these about 50 times each against the same directory, over and over, to avoid cache-based data skew, and I got roughly the following performance numbers (in real clock ti...