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sar -n DEV 1 1 | grep Average | grep eth0 它的意思是获取eth0的平均网速,这一行有10列,第四列是接收的速度,第五列是发送的速度,不同的系统可能不一样。 三、在ruby on rails里使用命令获取网速 在controller里用如下代码获取接收和发送网速 net = %x"sar -n DEV 1 1 | grep Average | grep et...
For most of common problems, Rails has a component at your disposal almost right out-of-the-box with documentation that is consistently above average (somehow, the Rails core team persuaded contributors that writing documentation is cool (even though we all know it’s not), leading to well wr...
Ruby在Rails场平均值?技术标签: 红宝石 收藏品 平均的 是否有一种简单的方法来获得集合中的属性的平均值? 例如,每个用户都有分数。 鉴于用户的集合(@users),您如何获得该组的平均分数? 有什么样的@ Users.Average(:得分)?我想我遇到了类似的东西,为数据库字段,但我需要它为集合工作... 看答案 为您的问题,...
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另外两种类型的缓存以前是Ruby on Rails的一部分,但现在可以作为单独的宝石使用: 页面缓存(Page caching):将整个网页作为静态文件缓存在服务器上,绕过整个页面渲染生命周期。 动作缓存(Action caching):缓存整个控制器动作的输出。它与页面缓存类似,但允许您应用过滤器,如身份验证。
然后它将下载最新版本的Ruby,Ruby on Rails框架及其依赖项。 代码语言:txt AI代码解释 ... ruby-2.3.0 - #configure ruby-2.3.0 - #download % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed ...
Ruby on Rails provides the web application foundation for a significant and growing number of companies. Hiring a quality Rails expert will help you achieve faster, more cost-effective development and ensure scalability, maintainability, and high-quality code that can adapt to the ever-evolving needs...
也许你需要进一步操作数据数组。在控制器中构建数据集（我使用了average，但这取决于您）：
RVM的主要作用是方便的管理系统中的多个ruby版本而不至于混乱。 我们来看看如何安装RVM,我使用的ubuntu12.04LTS。 准备工作 后面需要使用curl,用dpkg -s curl命令检查一下系统中有没有安装 abbuggy@abbuggy-ubuntu:~$ dpkg -s curlP