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What's the fastest way to loop through an array in JavaScript?

...e better performance, writing code that is less legible and more prone to errors than a simple straightforward for loop. Therefore, I recommend: If your app iterates over a lot of items or your loop code is inside a function that is used often, a straightforward for loop is the answer: for (var ...
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Is there a bash command which counts files?

...gt;/dev/null redirects stderr so that if there are 0 log files, ignore the error message. (Note that shopt -s nullglob would cause ls to list the entire working directory instead.) wc -l consumes the directory listing as it's being generated, so the output of ls is never in memory at any point in ti...
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New features in java 7

...tiple exception catching this: } catch (FirstException ex) { logger.error(ex); throw ex; } catch (SecondException ex) { logger.error(ex); throw ex; } becomes: } catch (FirstException | SecondException ex) { logger.error(ex); throw ex; } SafeVarargs this: @Suppre...
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kill -3 to get java thread dump

... If you're seeing that error, I suggest taking it up with your vendor. A quick search shows, for example, there is an open bug in RHEL regarding this error and openjdk... – Joshua McKinnon Nov 4 '13 at 19:46 ...
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Change R default library path using .libPaths in Rprofile.site fails to work

...up help page and there is RStudio material at: https://support.rstudio.com/hc/en-us/articles/200549016-Customizing-RStudio In your case it appears that RStudio is not respecting the Rprofile.site settings or perhaps is overriding them by reading an .Rprofile setting from one of the RStudio defaults...
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Generate random numbers with a given (numerical) distribution

... @stackoverflowuser2010: It shouldn't matter (modulo errors in floating point) – sdcvvc Jun 7 '13 at 12:52 ...
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盘点微软历史上9大失败软件产品! - 创意 - 清泛网 - 专注C/C++及内核技术

...务软件的目的是为信息、用户、系统、各种设备提供无缝连接的一组软件产品或服务。但不久,全世界都发觉这个定义操作起来太不现实。微软自己也一度承认其对 .NET 的定义和使用给用户带来了困惑,后来“.NET”就不在 Windows...
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程序员,你有多久没有跳出技术关注业界了? - 创意 - 清泛网 - 专注C/C++及内核技术

...如须要移动端开发时,要注意移动端开发的特殊性,网络连接与资源消耗大,流量也需要加以注意。这个时候,我们可以从后端技术上主动去做一些调整,比如减少连接,比如压缩数据,让前端做到更优化,如果前端的童鞋不懂...
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C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术

...f t2 is (7, 1) 接下来介绍tie()函数。 tie()函数可以将变量连接到一个给定的tuple上,生成一个元素类型全是引用的tuple,相当于make_tuple(ref(a),ref(b),…)。可以通过tie()函数的使用方便的对tuple进行“解包”操作。看下面的代码: #in...
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C++ 通过主机名/域名获取IP - C/C++ - 清泛网 - 专注C/C++及内核技术

...件定义了Socket编程的功能 #pragma comment(lib,"ws2_32.lib") 连接ws2_32.lib库...代码如下: #include <winsock2.h> //该头文件定义了Socket编程的功能 #pragma comment(lib,"ws2_32.lib") //连接ws2_32.lib库.只要程序中用到Winsock API 函数,都要用到 Ws2...