sample.rb

def compare_child_names_to_new_folder_name(folder_name, children)
      children.each do |child|
        if folder_name == child.name
          return false
        else
          return true
        end
      end
    end

    def is_catalog_unique?(catalogs, user, folder_name)
      folder_name = folder_name.gsub("+", " ")

      if catalogs.blank?
        @catalog = user.root_catalog
        children = @catalog.live_children

        self.compare_child_names_to_new_folder_name(folder_name, children)
      else
        catalogs.each do |catalog_id|
          @catalog = user.role.catalogs.find_by_id(catalog_id)
          children = @catalog.live_children

          self.compare_child_names_to_new_folder_name(folder_name, children)
        end
      end
    end

def is_catalog_unique?(catalogs, user, folder_name)
  folder_name = folder_name.gsub("+", " ")

  if catalogs.blank?
     @catalog = user.root_catalog
     children = @catalog.live_children

      break false if children.any? { |child| child == folder_name }
  else
    catalogs.each do |catalog_id|
      @catalog = user.role.catalogs.find_by_id(catalog_id)
      children = @catalog.live_children

      break false if children.any? { |child| child == folder_name }
    end
  end
end

   def is_catalog_unique?(catalogs, user, folder_name)
     folder_name = folder_name.gsub("+", " ")
     catalogs = if catalogs.blank? then [user.root_catalog] else catalogs.map { |c_id| user.role.catalogs.find_by_id(c_id) } end
     catalogs.all? do |catalog|
         !catalog.live_children.any? { |child| child == folder_name }
     end
   end