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entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
I am trying to save Employee details, which has references with City. But everytime I try to save my contact, which is validated I get the exception "ADO.Net Entity Framework An entity object cannot be referenced by multiple instances of IEntityChangeTracker"
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Calculate MD5 checksum for a file
I'm using iTextSharp to read the text from a PDF file. However, there are times I cannot extract text, because the PDF file is only containing images. I download the same PDF files everyday, and I want to see if the PDF has been modified. If the text and modification date cannot be obtained, is a ...
How do I measure time elapsed in Java? [duplicate]
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Unfortunately, none of the ten answers posted so far are quite right.
If you are measuring elapsed time, and you want it to be correct, you must use System.nanoTime(). You cannot use System.currentTimeMillis(), unless you don't mind your result being wrong.
The purpose of nanoTime...
Asynchronous method call in Python?
...ondering if there's any library for asynchronous method calls in Python . It would be great if you could do something like
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Why doesn't adding CORS headers to an OPTIONS route allow browsers to access my API?
...and read a few articles about how CORS works. First, I did this (code is written in CoffeeScript syntax):
32 Answers
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How to add a vertical Separator?
...follow
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edited Nov 16 '14 at 15:22
Chnossos
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Nested fragments disappear during transition animation
Here's the scenario: Activity contains fragment A , which in turn uses getChildFragmentManager() to add fragments A1 and A2 in its onCreate like so:
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Static constant string (class member)
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You have to define your static member outside the class definition and provide the initializer there.
First
// In a header file (if it is in a header file in your case)
class A {
private:
static const string RECTANGLE;
};
and then
// In one of the implementation files
c...
How to return a value from __init__ in Python?
I have a class with an __init__ function.
10 Answers
10
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UICollectionView reloadData not functioning properly in iOS 7
...t the reloadData method of a UICollectionViewController isn't acting quite how it used to.
17 Answers
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