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Do sealed classes really offer performance Benefits?
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the 'rambling' link is interesting in that it sounds like technical goodness but is in fact nonsense. Read the comments on the article for more info. Summary: the 3 reasons given are Versioning, Performance, and Security/Predictability - [see next ...
What is the difference between user and kernel modes in operating systems?
...tch from user mode to kernel mode is not done automatically by CPU. CPU is interrupted by interrupts (timers, keyboard, I/O). When interrupt occurs, CPU stops executing the current running program, switch to kernel mode, executes interrupt handler. This handler saves the state of CPU, performs its o...
Why should I avoid using Properties in C#?
...cheap to execute etc.
Personally I disagree with him on this particular point - I find properties make the client code much simpler to read than the equivalent method calls. I agree that developers need to know that properties are basically methods in disguise - but I think that educating developer...
How to create GUID / UUID?
... code for production environments are encouraged to use a rigorous, well-maintained implementation such as the uuid module.
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TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
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setsockopt(sock_fd, IPPROTO_TCP, TCP_NODELAY, (char *)&value,sizeof(int));
另外，网上有些文章说TCP_CORK的socket option是也关闭Nagle算法，这个还不够准确。TCP_CORK是禁止小包发送，而Nagle算法没有禁止小包发送，只是禁止了大量的小包发送。...
What is the most robust way to force a UIView to redraw?
...etNeedsDisplay]. If you're having trouble with that, you're likely running into one of these issues:
You're calling it before you actually have the data, or your -drawRect: is over-caching something.
You're expecting the view to draw at the moment you call this method. There is intentionally no wa...
How do you detect where two line segments intersect? [closed]
How do I determine whether or not two lines intersect, and if they do, at what x,y point?
27 Answers
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Injecting content into specific sections from a partial view ASP.NET MVC 3 with Razor View Engine
... seconding @JoshNoe and the rest -- a "widget" (display + rich interaction) is a perfect example of a partial view tightly coupled to associated javascript. By design I shouldn't have to write two include statements in different places to get the full functionality, because the display ...
Why would one use nested classes in C++?
Can someone please point me towards some nice resources for understanding and using nested classes? I have some material like Programming Principles and things like this IBM Knowledge Center - Nested Classes
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Django dynamic model fields
...le commands like:
eav.unregister(Encounter)
eav.register(Patient)
Nicely integrates with Django admin;
At the same time being really powerful.
Downsides:
Not very efficient. This is more of a criticism of the EAV pattern itself, which requires manually merging the data from a column format to...