From: Stu <stu@...>
Date: 2011-04-22T17:32:28+09:00
Subject: Re: Reversing a string without using array, classes and reverse function

On Fri, Apr 22, 2011 at 2:45 AM, Jose Calderon-Celis
<josecalderoncelis@gmail.com> wrote:

> for j in 1..len do
>  mycommand += s[-1*j]
>
>

very nice I like the use of your math. By multiplying the array index
by negative one your sending the index a reverse number while your for
loop traverses forward. This is perfect logic.

Here is a rewrite with my while loop:

s = "1234567890"
r=String.new
i = 1
while i <= s.length
  r << s[i*(-1)]
  i+=1
end
printf s
"0987654321"
 => "0987654321"
> y == x.reverse
true