kata.rb

def class_name(names)
  names.tr!("_", " ")
  items = names.split("/")
  items.map { |i| i.split.map(&:capitalize).join("") }.join("::")
end

puts class_name "upload/creator_details"
# -> Upload::CreatorDetails

puts class_name "upload/base"
# -> Upload::Base

puts class_name "index"
# -> Index