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Play Sound

Play Sound R语言中,当你想在程序运行完之后,发出一点声音提醒你,就可以这样玩: beer::beep(sound = 2) Usage beep(sound = 1, expr = NULL) Arguments sound character string or number specifying what sound to be played by either specifying one of the built in sounds

如何不通过 inventory 文件,直接指定 host 运行 Ansible?

如何不通过 inventory 文件,直接指定 host 运行 Ansible? 使用过 ansible 的都知道,不管是运行 Ad-Hoc 还是 playbook,都需要指定一个 inventory 文件,或者使用默认的 inventory 文件。但是现在有一个主机,它尚未在 inventory 文件中配置,那么我们该如何用 ansible 对其进行操作呢? 一般我们执行都是这样的: # ansible 172.16.1.7 -m ping 172.16.1.7 | SUCCESS = { "changed": false

用 Homebrew 带飞你的 Mac

用 Homebrew 带飞你的 Mac Homebrew也称brew,macOS下基于命令行的最强大软件包管理工具,使用Ruby语言开发。类似于CentOS的yum或者Ubuntu的apt-get,brew能方便的管理软件的安装、更新、卸载,省去了手动编译或拖动安装的不便,更使得软件的管理更加集中化,解决了依赖包管理的烦恼。 资料 官网 官方文档

如何通过github提升自己

lettuce.get('/some/cool/url', function (result) { expect(result). expect(doneFn).respondWith({ "status": 200, "contentType": 'text/plain', "responseText": 'awesome response' }); Lettuce.send = function (url, method, callback, data) { data = data || null; var request = new XMLHttpRequest(); if (callback instanceof Function) { request.onreadystatechange = function () { if (request.readyState === 4 (request.status === 200 || request.status === 0)) { callback(request.responseText);

工具使用——统计文章中的英文单词

They’re used for specifying a character class, which is a set of characters that you wish to match. Characters can be listed individually, or a range of characters can be indicated by giving two characters and separating them by a '-'. As in Python string literals, the backslash can be followed by various characters to signal various special sequences. It’s also used to escape all the metacharacters so you can still match them in patterns;

angular.forEach()

angular.forEach() angular.forEach() angular.forEach(obj, iterator, [context]); var tmpVal = angular.forEach(values, function(value, key, obj) { this.push(key + ': ' + value); console.log(log); result: Object {name: "misko", gender: "male"}//values ["name: misko", "gender: male"]//log Object {name: "misko", gender: "male"}//tmpVal

两分钟理解Android中SP与DP的区别

两分钟理解Android中SP与DP的区别 从一开始写Android程序,就被告知这些常识 1. 长度宽度的数值要使用dp作为单位放入dimens.xml文件中 2. 字体大小的数值要使用sp作为单位,也放入dimens.xml文件中 然后,就没有然后了,仿佛潜台词就是说,你记住去用就行了.

vertical-align浅析

vertical-align浅析 一直以来都搞不懂vertical-align,它适用于什么元素,它的对齐规则是什么样的。索性查了下w3c相关规范,发现行高和基线对齐的规范说明里有如下内容: This section is being rewritten. Refer to section 10.8 of [CSS2] for the normative CSS definition or the 2002 Working Draft if you want pretty pictures. (But ignore the old text, half of it’s wrong. We’re not specifying which half

ssh_exchange_identification 可能的问题

ssh_exchange_identification 可能的问题 ssh 登陆一台服务器的时候报错: $ ssh user@serverssh_exchange_identification: Connection closed by remote host以下是常见的原因以及解决方案: 1、检查 /etc/hosts.deny 和 /etc/hosts.allow 里面是否屏蔽了某些帐户;2、删除 ~/. Alternatively, random early drop can be enabled by specifying the three colon separated values “start:rate:full” (e.g. "10:30:60").