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entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
...n CityService. Later you add a city1 as a reference to the new Employee e1 and add e1 including this reference to city1 to the context in EmployeeService. As a result you have city1 attached to two different context which is what the exception complains about.
You can fix this by creating a context...
String contains - ignore case [duplicate]
...ks if CharSequence contains a search CharSequence irrespective of
case, handling null. Case-insensitivity is defined as by
String.equalsIgnoreCase(String).
A null CharSequence will return false.
This one will be better than regex as regex is always expensive in terms of performance.
For ...
Why does C++ require a user-provided default constructor to default-construct a const object?
The C++ standard (section 8.5) says:
5 Answers
5
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How to enter a multi-line command
Is it possible to split a PowerShell command line over multiple lines?
12 Answers
12
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Unique combination of all elements from two (or more) vectors
...
this maybe what you are after
> expand.grid(a,b)
Var1 Var2
1 ABC 2012-05-01
2 DEF 2012-05-01
3 GHI 2012-05-01
4 ABC 2012-05-02
5 DEF 2012-05-02
6 GHI 2012-05-02
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
11...
Create Generic method constraining T to an Enum
...ly true for constraints on a generic extension method, which is extremely handy for operating on enums, except for the fact that those extension methods are like a virus that infects all your objects. IConvertable at least narrows it down quite a bit.
– russbishop
...
How to recursively list all the files in a directory in C#?
How to recursively list all the files in a directory and child directories in C#?
22 Answers
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PHP Sort a multidimensional array by element containing date
...
Use usort() and a custom comparison function:
function date_compare($a, $b)
{
$t1 = strtotime($a['datetime']);
$t2 = strtotime($b['datetime']);
return $t1 - $t2;
}
usort($array, 'date_compare');
EDIT: Your data is or...
How to obtain the last path segment of a URI
...
I was searching for Android's android.net.Uri (not java.net.URI) and ended up here. If you're using that instead, there's a method there called getLastPathSegment() which should do the same thing. :)
– pm_labs
...
How do I uninstall a Windows service if the files do not exist anymore?
...xe) included in the Resource Kit.
(included with Windows 7/8)
Open a Command Prompt and enter
sc delete <service-name>
Tool help snippet follows:
DESCRIPTION:
SC is a command line program used for communicating with the
NT Service Controller and services.
delete---------...