Better ruby

better.rb

# if nil set value after ||
tweets = timeline.tweets || []

def sign_in
 current_session || sign_user_in
end

set_or_not_var ||= 2

options[:country] ||= 'us'

# conditional return

options[:path] = if list_name
 "/#{user_name}/#{list_name}"
else
 "/#{user_name}"
end

# modules

ActiveRecord::concern