emulate tree (only dirs)

emulate_tree_only_dirs.rb

def entries(dir)
  Dir.entries(dir) - ["..", "."]
end

def entries_map(directory, level=1, &block)
  entries(directory).map do |dir|
    if File.directory? "#{directory}/#{dir}" 
      puts "#{">"*level} #{dir}"
      block.call "#{directory}/#{dir}"
    end
  end
end

entries_map(".", 1) do |dir|
  entries_map(dir, 2) do |d|
    entries_map(d, 3) do |dd| 
      # etc..
    end
  end
end


#puts `tree`