よく読んでないけど便利そうなのでメモ。http://www.quora.com/Computer-Hardware/C-library-for-G-Code-parsing-interpreterGRBL https://github.com/grbl/grbl

http://www.opentone.co.jp/news/release/article03/article0304.html class User < ActiveRecord::Base validates :mail_address, :format => {:with => /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i} end 

Coderayを使う http://coderay.rubychan.de/doc/ビューファイルでraw出力する <%= CodeRay.scan("puts 'Hello, world!'", :ruby).div(:line_numbers => :table) %>