From: 7stud -- <lists@...>
Date: 2012-09-15T13:14:28+09:00
Subject: Re: how to write a array into a string

arr = ['a', 'b', 'c']
str = arr.each_with_index do |num, i|
  puts "#{i} => #{num}"
end

--output:--
0 => a
1 => b
2 => c
["a", "b", "c"]

You see, each_with_index() is a method call, and it has a return value, 
and the return value is the array you started with.  puts() is also a 
method and it sends text to your screen.  Displaying text on your screen 
does not save the text anywhere.

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