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How to implement the activity stream in a social network

...criber, I do a simple join of the three tables. The join is fast because I select few activities thanks to a WHERE condition that looks like now - time > some hours. I avoid other joins thanks to data field in Activity table. Further explanation on reason field. If, for example, I want to filter...
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How to debug Visual Studio extensions

...the loaded extension. Try the following Right click on the project and select Properties Go to the Debug Tab Click on the radio button for Start External Program. Point it to the devenv.exe binary. On my machine it's located at C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common...
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Simple Digit Recognition OCR in OpenCV-Python

...de a small code in OpenCV. It does following things: It loads the image. Selects the digits ( obviously by contour finding and applying constraints on area and height of letters to avoid false detections). Draws the bounding rectangle around one letter and wait for key press manually. This time we...
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The order of elements in Dictionary

...r elements in key-order then they should to dict.Keys.OrderBy( k => k ).Select( k => dict[k] ) instead (at the cost of O(n) space and O( n log n ) time) for the OrderBy() (which will need to buffer the entire keys collection in an internal list). – Dai Oc...
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using .join method to convert array to string without commas [duplicate]

... convert my array to a string so I can output it in a text box as the user selects numbers in a calculator, I'm not entirely sure how I can remove the commas that are also being output in the list however. Can someone advise how this can be achieved or if there is a different approach I should be us...
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进程间通信(IPC)的几种方式 - C/C++ - 清泛网 - 专注C/C++及内核技术

...,而且只能被显式删除,而且不能使用SOCKET的一些机制,例如select,epoll等. FAQ4: WINDOS进程间通信与LINUX进程间通信的关系? 答: 事实上,WINDOS的进程通信大部分移植于UNIX, WINDOS的剪贴板,文件映射等都可从UNIX进程通信的共享存储中找到...
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CSS3滚动条美化效果 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...当前被激活。(在webkit最近的版本中,该伪类也可以用于::selection伪元素。webkit团队有计划扩展它并推动成为一个标准的伪类) 另外,:enabled、:disabled、:hover 和 :active 等伪类同样可以用于滚动条中。 关于具体的demo,这里不再做...
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浅谈服务器单I/O线程+工作者线程池模型架构及实现要点 - 更多技术 - 清泛...

... 这种架构主要是基于I/O多路复用的思想(主要是epoll,select/poll已过时),通过单线程I/O多路复用,可以达到高效并发,同时避免了多线程I/O来回切换的各种开销,思路清晰,易于管理,而基于线程池的多工作者线程,又可以...
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Xenocode Postbuild 2010 for .NET 混淆工具的详细使用步骤 - 更多技术 - ...

... 6、选中图中所示的那两个复选框 7、点击【Select String】按钮进行设置 8、点击【output 标签】 9, 生成混淆后的文件 如果是安装好文件后 第一次 混淆文件,则需要把我们的 序列号 先...
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安卓中PrimaryColor、SecondaryColor、AccentColor的区别 - App Inventor 2...

...控件颜色,比如FloatingButton、TextField、Cursor、ProgressBar、Selection、Links等具体交互性的颜色。 附上Android Material设计图的Color说明