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Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
... array in Visual studio during debug. But you can also catch the exception and then write out the errors to some logging store or the console:
try
{
// Your code...
// Could also be before try if you know the exception occurs in SaveChanges
context.SaveChanges();
}
catch (DbEntityValid...
git + LaTeX workflow
I'm writing a very long document in LaTeX. I have my work computer and my laptop, and I work on them both. I need to keep all the files synchronized between the two computers, and also would like to keep a revision history. I chose git as my DVCS, and I'm hosting my repository on my server. I'm also...
Entity Framework and Connection Pooling
...ecently started to use the Entity Framework 4.0 in my .NET 4.0 application and am curious about a few things relating to pooling.
...
How to merge dictionaries of dictionaries?
...for key in b:
if key in a:
if isinstance(a[key], dict) and isinstance(b[key], dict):
merge(a[key], b[key], path + [str(key)])
elif a[key] == b[key]:
pass # same leaf value
else:
raise Exception('Conflict at %...
Why do we need Abstract factory design pattern?
...tract Factory has been accepted as the solution.
To the best of my understanding, these questions represent real concerns or problems that people had, so that should get you started with some real-life examples:
Is there a pattern for initializing objects created via a DI container
Can't combine ...
What is the difference between currying and partial application?
...rn value is a closure of lambda(z){z(x(y))} with passed-in the values of x and y to f(x,y).
One way to use partial application is to define functions as partial applications of generalized functions, like fold:
function fold(combineFunction, accumulator, list) {/* ... */}
function sum = curry...
How do I delete a Git branch locally and remotely?
I want to delete a branch both locally and remotely.
41 Answers
41
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How to do stateless (session-less) & cookie-less authentication?
Bob uses a web application in order to achieve something. And:
2 Answers
2
...
Which kind of pointer do I use when?
...wrote C++ for a living, std::auto_ptr was all the std lib had available, and boost::shared_ptr was all the rage. I never really looked into the other smart pointer types boost provided. I understand that C++11 now provides some of the types boost came up with, but not all of them.
...
How to convert image to byte array
Can anybody suggest how I can convert an image to a byte array and vice versa?
12 Answers
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