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MFC OnEraseBkgnd浅析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ssWizard(或者ctrl+W)->Class name中选你的view。然后在Class Info选项卡中,将Message Filter设为Child Window。重新切换到Message Map选项卡,在Messages中找到WM_ERASEBKGND,双击就添加成功了。点击右边的Edit Code,将函数体改为return TRUE,搞定...
Benefits of inline functions in C++?
... in different translation units, they are all the same, and the linker can freely keep one and discard all the other ones.
inline is mandatory if a function (no matter how complex or "linear") is defined in a header file, to allow multiple sources to include it without getting a "multiple definitio...
What is a void pointer in C++? [duplicate]
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A void* can point to anything (it's a raw pointer without any type info).
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How do I make a delay in Java?
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You need to use the Thread.sleep() call.
More info here: http://docs.oracle.com/javase/tutorial/essential/concurrency/sleep.html
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Why was “Avoid Enums Where You Only Need Ints” removed from Android's performance tips?
...ass does of course mean that your app contains an extra class, so it's not free, but we have to assume that a developer is only adding enums where they're useful. The only really bad use I've seen of enums was in some harmony code where they really wanted ints (for bitmasks and the like) and the "en...
How to get error information when HttpWebRequest.GetResponse() fails
...tring(), response.ErrorMessage);
}
Full disclosure
This library is a free open source wrapper library, and I am the author of said library. I make no money off of this but have found it immensely useful over the years and am sure anyone who is still using the HttpWebRequest / HttpWebResponse ...
Difference between numpy.array shape (R, 1) and (R,)
...─┘
and so:
>>> d[10,0]
10
A dimension of length 1 is "free" (in some sense), so there's nothing stopping you from going to town:
>>> e = a.reshape((1, 2, 1, 6, 1))
giving an array indexed like this:
i= 0 0 0 0 0 0 0 0 0 0 0 0
j= 0 0...
Find an element in DOM based on an attribute value
... though, hopefully the asker will move the accept for us - we want current info out there.
– Nick Craver♦
Dec 18 '13 at 13:10
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difference between throw and throw new Exception()
... original exception but resets the stack trace, destroying all stack trace information until your catch block.
NEVER write throw ex;
throw new Exception(ex.Message); is even worse. It creates a brand new Exception instance, losing the original stack trace of the exception, as well as its type. (...
gem install: Failed to build gem native extension (can't find header files)
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@NoBugs Thanks for the additional info :)
– Brian Lacy
Dec 29 '11 at 15:49
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