rails application name.rb

# We can get application class by

>> Rails.application.class.name
# => "Meetup::Application"

## Since we are only interested in application name, we can get it by

>> Rails.application.class.module_parent.name
# => "Meetup"

# Caveat: In previous versions of ruby, rails it can be acheived by
>> Rails.application.class.parent.name
# => "Meetup"