From: Jose Calderon-Celis <josecalderoncelis@...>
Date: 2011-04-22T16:45:40+09:00
Subject: Re: Reversing a string without using array, classes and reverse function

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#!/usr/bin/env ruby
#
require 'rubygems'

puts "ruby #{RUBY_VERSION}"
s = "This is to test reverse of a string"
p s
len=s.length
mycommand=""
for j in 1..len do
  mycommand += s[-1*j]
end
p mycommand
Jose Calderon-Celis
5199906-7970
http://www.tm.com.pe/mensajes/



2011/4/22 Rubist Rohit <passionate_programmer@hotmail.com>

> 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/.
>
>

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