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What is the difference between an interface and abstract class?

... interface does not have an implementation for a method is no longer valid now. Refer to this documentation page for more details. Have a look at this SE question for code examples to understand better. How should I have explained the difference between an Interface and an Abst
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__FILE__ macro shows full path

... If your platform supports it char* fileName = basename(__FILE__); It's definitely there in Linux and OS X, don't know about Windows though. – JeremyP Jul 17 '13 at 12:47 ...
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Concurrent HashSet in .NET Framework?

... you the same advantages than a HashSet<T> except key and value are different objects. Source: Social MSDN ConcurrentBag If you don't mind about the duplicate entries, you can use the class ConcurrentBag<T> in the same namespace of the previous class. private ConcurrentBag<string&...
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Is there a simple, elegant way to define singletons? [duplicate]

... bound to the module, which could not be instantiated repeatedly anyway. If you do wish to use a class, there is no way of creating private classes or private constructors in Python, so you can't protect against multiple instantiations, other than just via convention in use of your API. I would st...
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Smart way to truncate long strings

...px/15px verdana, arial; margin: 2rem; } .truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; width: 30vw; } .truncate:before{ content: attr(data-longstring); } .truncate:hover::before { content: attr(data-longstring); width: auto; height:...
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How do I correctly clean up a Python object?

...al variables" (member data in this context?) when __del__() is invoked. If that is the case and this is the reason for the exception, how do I make sure the object destructs properly? ...
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How to get the system uptime in Windows? [closed]

I am using windows 7 and xp. I want to know the uptime of the system. 3 Answers 3 ...
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Using CookieContainer with WebClient class

...ed a CookieContainer with HttpWebRequest and HttpWebResponse sessions, but now, I want to use it with a WebClient. As far as I understand, there is no built-in method like there is for HttpWebRequests ( request.CookieContainer ). How can I collect cookies from a WebClient in a CookieContainer? ...
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Would you, at present date, use JBoss or Glassfish (or another) as Java EE server for a new project?

... licensing fees, solid reputation and support, etc. That is where I start nowadays. Most applications/systems choose lots of fancy J2EE features when all they really need is servlets and JDBC with some decent architecture/design. Question why you think you need more. Of the full-blown containers...
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When is “i += x” different from “i = i + x” in Python?

I was told that += can have different effects than the standard notation of i = i + . Is there a case in which i += 1 would be different from i = i + 1 ? ...