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Should I Dispose() DataSet and DataTable?
...y !FinalizeQueue in SOS)
The DataTable, DataSet, DataView classes are all rooted at MarshalByValueComponent, a finalizable object that can (potentially) handle unmanaged resources
Because DataTable, DataSet, DataView don’t introduce unmanaged resources, they suppress finalization in their const...
Using Custom Domains With IIS Express
... ▼ from the drop down
Project Url: http://localhost
Override application root URL: http://dev.example.com
Click Create Virtual Directory (if you get an error here you may need to disable IIS 5/6/7/8, change IIS's Default Site to anything but port :80, make sure Skype isn't using port 80, etc.)
O...
JavaScript DOM remove element
...ethod to the prototypes of any any elements that CAN be the
// root of the DOM. However, it's required by spec (see point 1 of
// https://dom.spec.whatwg.org/#dom-childnode-remove) and would
// theoretically make a difference if somebody .apply()ed this
...
On delete cascade with doctrine2
...rine's cascade={"remove"} removes the related entities before removing the root entity (it has to). So when the root entity is deleted there aren't any foreign relations left for onDelete="CASCADE" to delete. But to be sure I would suggest you simply create a small test case and look at the queries ...
When to use inline function and when not to use it?
... most important rule of optimization is that premature optimization is the root of all evil. Always write clear code (using efficient algorithms), then profile your program and only optimize functions that are taking too long.
If you find a particular function is very short and simple, and it's ge...
Finding the number of days between two dates
...also hour-minute-second; same happpens with DATE type in databases such as MySQL), the widely used formula
(unix_timestamp(DATE2) - unix_timestamp(DATE1)) / 86400
or
floor(time() - strtotime($somedate)) / 86400
will return, say, 17 when DATE1 and DATE2 are in the same DST segment of the year...
通信连接组件 · App Inventor 2 中文网
...
更多有关Activity启动器使用技巧请查看《Activity启动器如何查看并启动其他App》。
属性
Action
指定将用于启动Activity活动的操作。
Activity类名
指定将启动的特定组件的Class类部分。
Activity包名
指定将启动的特定组件...
Paging in a Rest Collection
...em I'm running into is how to handle the GET operation on the collection root if the collection is large.
12 Answers
...
How to force the browser to reload cached CSS/JS files?
...($file)
{
if(strpos($file, '/') !== 0 || !file_exists($_SERVER['DOCUMENT_ROOT'] . $file))
return $file;
$mtime = filemtime($_SERVER['DOCUMENT_ROOT'] . $file);
return preg_replace('{\\.([^./]+)$}', ".$mtime.\$1", $file);
}
Now, wherever you include your CSS, change it from this:
<lin...
What is the fastest method for selecting descendant elements in jQuery?
...aron @Marko - The tests might be a little skewed as we're always using the root node as context, and the document is pretty big. Despite that, I'm seeing 1 and 2 line up within 20 ops/sec to each other on most runs. Compared to 1 and 2, 4 is about 100-200 ops slower, and 5 is about 400 ops slower wh...