From: HarryO <harryo@...>
Date: 2001-12-31T19:21:50+09:00
Subject: [ruby-talk:29834] Re: Unbuffered print

On Mon, 31 Dec 2001 20:54:48 +1100, Nigel Gilbert wrote:

> I have a program that takes about a second to go round a loop.  Every
> time it does so, I want to print a dot ('.') to standard out, so that I
> can see that something is happening.  If I just use 'print "."', nothing
> is output until I print a newline.  What should I be using?

You could either write to $stderr, which is unbuffered. Eg,

   $stderr.print "Hello"

or change the "sync" mode for $stdout, as in 

   $stdout.sync = true

which will cause all data to be written immediately.