From: "Mehr, Assaph (Assaph)" <assaph@...>
Date: 2004-09-06T13:33:06+09:00
Subject: Re: Problem Having Ruby Wait for a User Input


> Oh, your first link is broken.

Both links work - just retested. If you have trouble accessing it go to
www.ruby-doc.org, Core API, and select "lib/observer.rb" from under
"Files".


> Here is the code in question, it is intended to get only a single key
press
> for a limited range of keys.  
>
>def key_input  #Get arbitrary keyboard input
>    input = 0
>    n = 0
>    for i in 1..18
>      if Input.trigger?(i)
>        n = i
>      end
>    end
>    if n > 0
>      input = n
>    end
>   return input
>  end 
>
>Does this clear anything up?

There is no code above to get a character from std-in. If you want
single characters from a stream you can use IO#getc, as in:
	a = STDIN.getc
Or:
	a = STDIN.sysread(1)

But both depend on the underlying OS buffering - i.e. you will not get
the characters until the user feed the input line by presseing enter.