From: Power One <arghx1@...>
Date: 2009-03-09T02:10:12+09:00
Subject: Re: I code my first ruby script, and it got problem!

Once again, thank so much Park!

I wonder why do I have to use ensure to have the subsequent method 
del_dir to work?

After seeing you used ensure, I read on the Internet, it says that 
ensure is helping to make sure the code block within ensure will always 
be executed.

Though when I do Dir.chdir("#{@dirname}"), isn't this adequate?  I saw 
that you have to use cwd = Dir.pwd, and then do Dir.chdir, and then do 
ensure again!

Just out of curiosity as I really want to understand Ruby's process. 
Thank You so much, please help explain :).

Heesob Park wrote:
> 2009/3/8 Power One <arghx1@yahoo.com>:
>>>   if @dirname = gets
>> gets.chomp did the job perfectly, but my very last code is like
>>      puts "#{@dirname} is still here!"
>>    end
>>    end
>>
> The del_dir method has no problem.
> 
> The problem is due to see_me method.
> Modify see_me something like this will work.
> 
>   def see_me
>     if File.exist?("#{@dirname}")
>       cwd = Dir.pwd
>       begin
>         Dir.chdir("#{@dirname}")
>         puts Dir.pwd
>       ensure
>         Dir.chdir(cwd)
>       end
>     else
>       puts "This directory #{@dirname} is not exist!"
>     end
>   end
> 
> 
> Regards,
> 
> Park Heesob

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