avdi

When it comes to the Observer pattern, there are a number of related, overlapping terms used by different codebases. Off the top of my head:

• Observer/Observable/Subject
• Listener/Listenable
• Event/Event source/Event sink/Event handler
• Hook/Callback
• Subscriber/Subscribable
• "Firing" vs. "Triggering" vs "Notifying" vs "Executing"

Which of these do consider to be synonymous?

jimbojsb

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

mironov

module Rack
  class Request
    def scheme
      if @env['HTTPS'] == 'on'
        'https'
      elsif @env['HTTP_X_FORWARDED_SSL'] == 'on'
        'https'
      elsif @env['HTTP_X_FORWARDED_PROTO']
        @env['HTTP_X_FORWARDED_PROTO'].split(',')[0]
      else