常用到的 gem 列表
Nokogiri HTML XML 解析
Sinatra 轻量级 Web 框架
Glorify Sinatra Markdown 语法高亮
Mechanize 与网页交互
SQLite3/Ruby SQLite 3
Rails Ruby on Rails
Rerun 文件变动后重新执行
Pry 交互式终端，比 irb 好用
Byebug 代码调试
Plist 读写plist
therubyracer eval Javascript
Rainbow colorizing printed text on ANSI terminals.
gem sources --remove https://rubygems.org/
gem sources -a https://ruby.taobao.org/
gem install nokogiri sinatra glorify mechanize sqlite3 rails rerun pry byebug plist2 therubyracer rainbow