Home » Developing U++ » U++ Developers corner » What does !! in e.g. FtpClient class mean?
| Re: What does !! in e.g. FtpClient class mean? [message #39624 is a reply to message #39623] |
Wed, 10 April 2013 14:39   |
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| NilaT wrote on Wed, 10 April 2013 13:57 |
I just got a very noobish question.
What is the following Statement good for?
!!FtpDelete(path, ftpconn);
(This example is from the FtpClient class, but there maybe others)
!! = not not? Why use it then anyway?
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Hi NilaT,
This question appears here regulary, and it's not really noobish  What it in fact does is a cast to bool The first negation causes imlicit cast to bool and the second one just returns the value to the original. Same as if you wrote (bool)FtpDelete(path, ftpconn);
I'm not exactly sure why Mirek prefers writing it this way, but I strongly suspect the reason is that it is faster to write You can find it on many places in U++ sources...
Best regards,
Honza
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