app/helpers/tags_helper.rb


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module TagsHelper

  def tag_cloud(tags, classes)
    max = tags.sort_by(&:taggings_count).last
    tags.each do |tag|
      index = tag.taggings_count.to_f / max.taggings_count * (classes.size - 1)
      yield(tag, classes[index.round])
    end
  end

end