From: 7stud -- <lists@...>
Date: 2012-09-15T13:18:05+09:00
Subject: Re: how to write a array into a string

arr = ['a', 'b', 'c']
result_str = ""

arr.each_with_index do |num, i|
  result_str << "#{i} => #{num}\n"
end

puts result_str  #or add result_str to an email

--output:--
0 => a
1 => b
2 => c

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