Re: Reversing a string without using array, classes and reverse function

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From	Rubist Rohit <passionate_programmer@hotmail.com>
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Subject	Re: Reversing a string without using array, classes and reverse function
Date	Fri, 22 Apr 2011 00:07:14 -0500
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I attempted below given code, but it is neither displaying result nor 
error:

================CODE==========================
s = "This is to test reverse of a string"
len = s.length
for j in len..1 do
  mycommand = "s.scan(/.$/) {|x| puts x}"
  mycommand = mycommand.insert 7,"."
end
==============================================

What I am doing is to insert a period (.) in the seventh or eighth 
position on each loop.


spiralofhope wrote in post #994433:
> On Fri, 22 Apr 2011 12:54:16 +0900
>> I am trying this:
>>
>> mystring = gets
>> mystring.scan(/..$/) {|x| puts x}
>>
>> It returns only the last character. Is it possible to add the above
>> line in loop?
>
> Here's something I stumbled through which seems to work.
>
> - Using a regex of /.$/
> - Slowly chomping away at the original string.
> - Using another variable to build my result.
>
> mystring = 'Hello, World!'
> result = ''
>
> fail = 0
> until fail == "100" or mystring == '' do
>   fail += 1
>   mystring.match( %r{(.$)} )
>   break if $~ == nil
>   result += $~[1]
>   mystring = mystring.chomp( $~[1] )
> end
>
> puts result

-- 
Posted via http://www.ruby-forum.com/.

Thread

Reversing a string without using array, classes and reverse function Rubist Rohit <passionate_programmer@hotmail.com> - 2011-04-21 22:54 -0500
  Re: Reversing a string without using array, classes and reverse function spiralofhope <spiralofhope_rubyml@lavabit.com> - 2011-04-21 23:32 -0500
    Re: Reversing a string without using array, classes and reverse function Rubist Rohit <passionate_programmer@hotmail.com> - 2011-04-22 00:07 -0500
      Re: Reversing a string without using array, classes and reverse function Jose Calderon-Celis <josecalderoncelis@gmail.com> - 2011-04-22 02:45 -0500
        Re: Reversing a string without using array, classes and reverse function Stu <stu@rubyprogrammer.net> - 2011-04-22 03:32 -0500
          Re: Reversing a string without using array, classes and reverse function Stu <stu@rubyprogrammer.net> - 2011-04-22 03:43 -0500
            Re: Reversing a string without using array, classes and reverse function Larry Lv <larrylv1990@gmail.com> - 2011-04-22 04:24 -0500
        Re: Reversing a string without using array, classes and reverse function Rubist Rohit <passionate_programmer@hotmail.com> - 2011-04-22 06:56 -0500
  Re: Reversing a string without using array, classes and reverse function Stu <stu@rubyprogrammer.net> - 2011-04-22 03:16 -0500
  Re: Reversing a string without using array, classes and reverse function Robert Dober <robert.dober@gmail.com> - 2011-04-22 04:51 -0500
    Re: Reversing a string without using array, classes and reverse function Jose Calderon-Celis <josecalderoncelis@gmail.com> - 2011-04-22 09:42 -0500
      Re: Reversing a string without using array, classes and reverse function Brian Candler <b.candler@pobox.com> - 2011-04-23 06:11 -0500
        Re: Reversing a string without using array, classes and reverse function Robert Dober <robert.dober@gmail.com> - 2011-04-23 07:34 -0500
  Re: Reversing a string without using array, classes and reverse function Hans Mackowiak <hanmac@gmx.de> - 2011-04-22 05:33 -0500
  Re: Reversing a string without using array, classes and reverse function Harry Kakueki <list.push@gmail.com> - 2011-04-22 06:15 -0500
    Re: Reversing a string without using array, classes and reverse function spiralofhope <spiralofhope_rubyml@lavabit.com> - 2011-04-22 07:05 -0500
    Re: Reversing a string without using array, classes and reverse function Rubist Rohit <passionate_programmer@hotmail.com> - 2011-04-22 07:17 -0500
  Re: Reversing a string without using array, classes and reverse function Josh Cheek <josh.cheek@gmail.com> - 2011-04-23 13:33 -0500
    Re: Reversing a string without using array, classes and reverse function Duke Normandin <dukeofperl@ml1.net> - 2011-04-23 13:56 -0500
    Re: Reversing a string without using array, classes and reverse function Adam Prescott <adam@aprescott.com> - 2011-04-23 16:16 -0500

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