From: Idan Sofer <idan@...>
Date: 2002-11-15T17:34:46+09:00
Subject: Re: Howot redirect STDOUT to a string within a script?

On ��� ����, 15 ������� 2002, 05:48, WATANABE Hirofumi wrote:
> Ruby 1.7 has StringIO.
>
> require 'stringio'
>
> def redirect
>   orig_defout = $defout
>   $defout = StringIO.new
>   yield
>   $defout.string
> ensure
>   $defout = orig_defout
> end
>
> evalstr = 'puts "this is the string"'
> outputStr = redirect { eval evalstr }
> p outputStr
The problem with this approach is that it's not thread safe($defout is 
tampered), and that the same can be done with much less coding using 
instance_eval method:

===
require 'stringio'

s=StringIO.new
evalstr ='puts "this is the string"'
s.instance_eval evalstr
p s
===