Ruby5 #449

Ruby5 - Episode #449– March 18th, 2014

• Experimental Features
  • business hours feature flag
• Rails is Half Your App
  • there are two parts of your application, the part that only works inside Rails and the part that is independent of Rails
• Rake Rule Tasks
  • rule /foo/ do |task|
    • puts 'called task named: %s' % task.name
• Polymorphism
  • Inheritance
  • Duck Typing
  • Decorator Pattern
  • A Simple Before and After
• Hash Selector Pattern
  • 8min video
  • if flash[:type] == :success ; 'alert-success' ; elsif flash[:type] == :error
  • case flash[:type] ; when :success then 'alert-success'
    • case is really slow
  • { success: 'alert-success', ..., warn: 'alert-warning' }[flash[:type]]
  • Procs and Lambdas
    • { true => -> { self.respond_with @post, @comment },
    • false => -> { self.xms_error @comment }
    • }[@comment.save].call
• Rails 4.0.4 released
  • bug fix release and includes more than 290 commits

Hash Selector Patternはどこからも教わらず自分で編み出してよく使ってた

♫ Bee Gees - Night Fever

by SoundHound