From: Matt Armstrong <matt@...>
Date: 2003-01-28T16:31:04+09:00
Subject: Re: loop while

Tim Bates <tim@bates.id.au> writes:

> Why can't I do:
>
>   loop while t.gets !~ /[Cc]onnected/

If you want a one liner:

    while t.gets !~ /[Cc]onnected/; end

or

    until t.gets =~ /[Cc]onnected/; end

or

    loop { break if t.gets =~ /[Cc]onnected/ }

Note that all of these will fall into an infinite loop at end of file
since both "nil =~ Regexp" and "Regexp =~ nil" are always false.

> Is there a similarly terse but readable way of doing this? I just want to 
> throw away all input until I reach the 'connected' line (assuming t is a 
> TCPSocket...)

I would probably end up with:

    while line = t.gets
      break if line =~ /[Cc]onnected/
    end
    fail "EOF waiting for Connected line" unless line

because I value robustness over terseness.  ;-)