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mongodb count num of distinct values per field/key
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MongoDB has a distinct command which returns an array of distinct values for a field; you can check the length of the array for a count.
There is a shell db.collection.distinct() helper as well:
> db.countries.distinct('country');
[ "Spain", "England", "France", "Aust...
Using comma as list separator with AngularJS
... .join because it allows the elements in the list to each be members of an array, like: <b ng-repeat="friend in friends">{{friend.email}}{{{true: '', false: ', '}[$last]}}</b>
– Ryan Marcus
May 25 '13 at 20:25
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AngularJS ng-repeat handle empty list case
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Indeed @ArtemAndreev. When "events" is an empty array, it returns true even though the array is empty
– Rob Juurlink
May 15 '13 at 12:33
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Should everything really be a bundle in Symfony 2.x?
...@Secure("ROLE_ADMIN")
*
* @param Request $request
* @return array
*/
public function addAction(Request $request)
{
$user = new User;
$form = $this->formFactory->create('user', $user);
if ($request->getMethod() == 'POST') {
$fo...
How best to include other scripts?
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Just learned about BASH_SOURCE array, and how the first element in this array always points to the current source.
– haridsv
Feb 11 '14 at 9:31
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Dynamically load a JavaScript file
...){
// First make sure it hasn't been loaded by something else.
if( Array.contains( includedFile, url ) )
return;
// Determine the MIME-type
var jsExpr = new RegExp( "js$", "i" );
var cssExpr = new RegExp( "css$", "i" );
if( type == null )
if( jsExpr.test( url...
C#对象序列化与反序列化 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
...Line("OK!");
Console.Read();
}
}
序列化生成的XML文件：
<ArrayOf个人信息xmlns:xsi="..."xmlns:xsd="...">
<个人信息姓名="李志伟"性别="true" />
<个人信息姓名="李志伟"性别="true" />
<个人信息姓名="李志伟"性别="true" />
</ArrayOf个人信...
How to remove extension from string (only real extension!)
... Looking at the commits on php.net there is an idea about working with an array...which I think could be improved using something such as array-walk
– CrandellWS
Feb 3 '15 at 16:10
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Generating a random password in php
...cdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
$pass = array(); //remember to declare $pass as an array
$alphaLength = strlen($alphabet) - 1; //put the length -1 in cache
for ($i = 0; $i < 8; $i++) {
$n = rand(0, $alphaLength);
$pass[] = $alphabet[$n];
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How to remove elements from a generic list while iterating over it?
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For those coming from Java, C#'s List is like ArrayList in that insertion/removal is O(n) and retrieval via an index is O(1). This is not a traditional linked list. It seems a bit unfortunate C# uses the word "List" to describe this data structure since it brings to mind...