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entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
...ater 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 outside of the ...
Factors in R: more than an annoyance?
...ecause model fitting packages like lme4 use factors and ordered factors to differentially fit models and determine the type of contrasts to use. And graphing packages also use them to group by. ggplot and most model fitting functions coerce character vectors to factors, so the result is the same. Ho...
What does MissingManifestResourceException mean and how to fix it?
... string "Servers.Resources" had to be changed to "RT.Servers.Resources". I did this manually, but running the custom tool would have equally well done it.
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Simplest way to detect a mobile device in PHP
...|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|es...
What's the difference between dynamic (C# 4) and var?
... that new keyword that is shipping with C# v4, but I couldn't make out the difference between a "dynamic" and "var".
14 Ans...
How do I pass values to the constructor on my wcf service?
...stance(InstanceContext instanceContext, object instance)
{
var disposable = instance as IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
#endregion
#region IContractBehavior Members
public void AddBindingParameters(Co...
Should I instantiate instance variables on declaration or in the constructor?
...
There is no difference - the instance variable initialization is actually put in the constructor(s) by the compiler.
The first variant is more readable.
You can't have exception handling with the first variant.
There is additionally the ...
How to achieve function overloading in C?
Is there any way to achieve function overloading in C? I am looking at simple functions to be overloaded like
14 Answers
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How to get relative path from absolute path
There's a part in my apps that displays the file path loaded by the user through OpenFileDialog. It's taking up too much space to display the whole path, but I don't want to display only the filename as it might be ambiguous. So I would prefer to show the file path relative to the assembly/exe direc...
What in the world are Spring beans?
...erenced often in Grails documentation and books, but I think that understanding what they are would be beneficial. So what are Spring beans? How can they be used? Do they have something to do with Dependency Injection?
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