From: ES <ruby-ml@...>
Date: 2005-05-15T11:28:28+09:00
Subject: Re: re-opening STDIN after it's been closed?

David Vincelli wrote:
> Hi,
> 
> On 5/14/05, nobu.nokada@softhome.net <nobu.nokada@softhome.net> wrote:
> 
>>You should alwasy check if get succeeded.
>>
>>prompt = <<PROMPT
>>Make your selection from the list below: \n
>>a) foo
>>b) bar
>>
>>PROMPT
>>
>>while (print(prompt); ans = gets)
>>handle_action(ans)
>>end
> 
> 
> 
> I haven't tried this yet but it's definately better than what I originally 
> posted.
> 
> 
>>Or even better if you can use readline:
>>
>>while ans = readline(prompt)
>>handle_action(ans)
>>end
> 
> 
> 
> But I did try this. I don't think your usage of readline is correct. ri 
> tells me that readline takes a single parameter and it's the line seperator. 
> 
> 
> I suppose you meant this:
> 
> while (print prompt; ans = readline)
> handle_action(ans)
> end
> 
> No way to do it. If you believe STDIN is connected to tty, you
> 
>>may want to do STDIN.reopen("/dev/tty").
> 
> 
> 
> Thanks for the tip. I'll stick to the fixed up while loop.
> 

Have you taken a look at some libraries to help you with this?

Cmd[1] is a simple tool for creating command-line oriented interpreters
        (think of sqlite/svnadmin/mysqladmin etc.)

HighLine[2] provides a higher-level interface to the command-line from
             your script.

E

[1] http://rubyforge.org/projects/cmd/
[2] http://rubyforge.org/projects/highline/

-- 
template<typename duck>
void quack(duck& d) { d.quack(); }