pretty_print_hash.rb

def pph(hash, depth=0, output="")
  if hash.is_a?(Hash)
    carriage_return = depth > 0 ? "\n" : ""
    output <<  carriage_return
    hash.each do |key, val| 
      output <<   "\t" * depth + "#{key}\t=>\t#{pph(val, depth+1)}"
    end
  elsif hash.is_a?(Array)
    return "["+hash.join(", ")+"]" +"\n"
  else
    return hash.to_s+"\n"
  end
  if depth > 0
    return output
  else
    puts output
  end
end