Limbo Peng questions

Limbo Peng answers

• How do you use unicode characters within a regular expression in Ruby?
• How to use Unix pager programs like `less` from Ruby?
• Using sed and regex to capture last part of url
• need help setting up ruby on rails javascript runtime environment
• Unicorn unable to write pid file
• Compare multiple variables to the same value in "if"? [duplicate]
• Where to override current_user helper method of devise gem