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Why do we need a pure virtual destructor in C++?
...Base = new Derived();
delete pBase;
Base* pBase2 = new Base(); // Error 1 error C2259: 'Base' : cannot instantiate abstract class
}
When you want that no one should be able to create the object of Base class directly, use pure virtual destructor virtual ~Base() = 0. Usually at-least on...
Disable hover effects on mobile browsers
...s with the following alternatives:
browser detection: Extremely prone to errors. Assumes that a device has either mouse or touch, while a combination of both will become more and more common when touch displays prolifirate.
CSS media detection: The only CSS-only solution I'm aware of. Still prone ...
Request is not available in this context
...s not available in this
context” exception is one of the more
common errors you may receive on when
moving ASP.NET applications to
Integrated mode on IIS 7.0. This
exception happens in your
implementation of the
Application_Start method in the
global.asax file if you attempt to
...
The difference between the 'Local System' account and the 'Network Service' account?
... the external process starts up but it fails to create the COM object. The error returned from the COM object creation is not a standard COM error (I think it's specific to the COM object being created).
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Ignore Xcode warnings when using Cocoapods
...rnings are shown in my Xcode on the place I want to see my own warnings or errors.
4 Answers
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When should I use Arrow functions in ECMAScript 6?
...nction anyway. Consistently using function on the global scope helps avoid errors.
Many functions in the global scope are object constructors for old-style class definitions.
Functions can be named1. This has two benefits: (1) It is less awkward to writefunction foo(){} than const foo = () => {} ...
git diff between cloned and original remote repository
... Thank you for the HEAD..origin/master syntax! We've been getting errors with origin/HEAD not existing, and this solved it.
– Dan Bechard
Nov 6 '15 at 19:37
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Execute Insert command and return inserted Id in Sql
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I was getting an invalid cast error when trying to cast the int modified = (int)cmd.ExecuteScalar(); to an int. I had to use Convert to convert it to an int. int modified = Convert.ToInt32(cmd.ExecuteScalar());
– Baddack
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Why is Hibernate Open Session in View considered a bad practice?
..., it will occur during the writing of the page: you cannot present a clean error page to the user and the only thing you can do is write an error message in the body
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return statement vs exit() in main()
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abort() exits with error condition (non-zero exit code) and may be even a core. If you need to exit w/o calling static destructors, use _exit .
– user3458
Jan 20 '09 at 14:46
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