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How to check that an object is empty in PHP?
...nswer below
Updated Answer (SimpleXMLElement):
For SimpleXMLElement:
If by empty you mean has no properties:
$obj = simplexml_load_file($url);
if ( !$obj->count() )
{
// no properties
}
OR
$obj = simplexml_load_file($url);
if ( !(array)$obj )
{
// empty array
}
If SimpleXMLElemen...
How to count instances of character in SQL Column
...
@StevenWhite DATALENGTH returns number of bytes used. So NVARCHAR will be doubled.
– domenicr
Nov 20 '15 at 20:54
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What is the X-REQUEST-ID http header?
...
When you're operating a webservice that is accessed by clients, it might be difficult to correlate requests (that a client can see) with server logs (that the server can see).
The idea of the X-Request-ID is that a client can create some random ID and pass it to the server. T...
Get all table names of a particular database by SQL query?
I am working on application which can deal with multiple database servers like "MySQL" and "MS SQL Server".
19 Answers
...
Difference between database and schema
...group logical objects together, which leads to ease of setting permissions by schema.
EDIT for additional question
drop schema test1
Msg 3729, Level 16, State 1, Line 1
Cannot drop schema 'test1' because it is being referenced by object 'copyme'.
You cannot drop a schema when it is in use. You h...
Visual Studio “Could not copy” … during build
...
When clean+build has not resolved this problem for me, I have had success by doing the following:
Closing Visual Studio
Deleting the bin and obj folders, and
Reopening Visual Studio.
This "bug" has existed since Visual Studio 2003.
Finally, I have also found that I can often overcome this prob...
Parallel.ForEach vs Task.Factory.StartNew
...erall runtimes to be slower.
FYI - The Partitioner used can be controlled by using the appropriate overloads to Parallel.ForEach, if so desired. For details, see Custom Partitioners on MSDN.
The main difference, at runtime, is the second will act asynchronous. This can be duplicated using Parall...
Way to ng-repeat defined number of times instead of repeating over array?
... (no function needed):
<li ng-repeat="x in [].constructor(number) track by $index">
<span>{{ $index+1 }}</span>
</li>
$scope.number = 5;
This was not possible at the time the question was first asked. Credit to @Nikhil Nambiar from his answer below for this update
Ori...
How do Trigonometric functions work?
...For starters, you could reduce angles to be between 0 and 360 degrees. But by using a few identities, you realize you could get by with less. If you calculate sines and cosines for angles between 0 and 45 degrees, you can bootstrap your way to calculating all trig functions for all angles.
Once yo...
How do I daemonize an arbitrary script in unix?
...
You can daemonize any executable in Unix by using nohup and the & operator:
nohup yourScript.sh script args&
The nohup command allows you to shut down your shell session without it killing your script, while the & places your script in the background ...