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Need to understand the usage of SemaphoreSlim

... use the using statement which could make coding neater and safer. http://www.tomdupont.net/2016/03/how-to-release-semaphore-with-using.html I did swap _isDisposed=true and _semaphore.Release() around in its Dispose though in case it somehow got called multiple times. Also it is important to not...
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How can I export the schema of a database in PostgreSQL?

...computer broke down but fortunately I backed up the folder C:\Program Files\PostgreSQL. 8 Answers ...
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Determining type of an object in ruby

...dd he said "Data has Types not objects". So we might enjoy this. https://www.youtube.com/watch?v=1l3U1X3z0CE But Ruby doesn't care to much about the type of object just the class. We use classes not types. All data then has a class. 12345.class 'my string'.class They may also have ancestors...
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top命令使用详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...个人定制文件中进行设定. top [-] [d delay] [p pid] [q] [c] [C] [S] [s] [i] [n iter] [b] p 仅监视进程给定的进程ID d 指定每两次屏幕信息刷新之间的时间间隔。当然用户可以使用s交互命令来改变之。 q 该选项将使top没有任何延迟的进行刷...
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Differences between detach(), hide() and remove() - jQuery

...</script> </body> </html> For more info, visit: http://www.scriptcafe.in/2014/03/what-is-difference-between-jquery_15.html share | improve this answer | f...
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In Firebase, is there a way to get the number of children of a node without loading all the node dat

...lue) { return (current_value || 0) + 1; }); For more info, see https://www.firebase.com/docs/transactions.html UPDATE: Firebase recently released Cloud Functions. With Cloud Functions, you don't need to create your own Server. You can simply write JavaScript functions and upload it to Firebase....
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What is the @Html.DisplayFor syntax for?

...t this blog on MVC2 templates. It's still very applicable to MVC3: http://www.dalsoft.co.uk/blog/index.php/2010/04/26/mvc-2-templates/ It's also useful if your Model has a Data annotation. For instance, if the property on the model is decorated with the EmailAddress data annotation, DisplayFor w...
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What's the point of having pointers in Go?

... I really like example taken from http://www.golang-book.com/8 func zero(x int) { x = 0 } func main() { x := 5 zero(x) fmt.Println(x) // x is still 5 } as contrasted with func zero(xPtr *int) { *xPtr = 0 } func main() { x := 5 zero(&a...
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MySQL select 10 random rows from 600K rows fast

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Difference between WebStorm and PHPStorm

...hat much. You should train your search-fu twice as harder. FROM: http://www.jetbrains.com/phpstorm/ NOTE: PhpStorm includes all the functionality of WebStorm (HTML/CSS Editor, JavaScript Editor) and adds full-fledged support for PHP and Databases/SQL. Their forum also has quite few answers ...