From: Ken Bloom <kbloom@...>
Date: 2006-12-20T00:10:12+09:00
Subject: Re: Division hangs irb

On Tue, 19 Dec 2006 23:06:05 +0900, Vincent Fourmond wrote:

> Ashley Moran wrote:
>> Anyone know why the first three of these calculations works on my irb
>> (on intel OS X 10.4.8), but the last one silently hangs?
>> 
>>>> (DateTime.now - Date.new(2006,9,15)).to_f / 30
>> => 3.18572031018981
>>>> (DateTime.now - Date.new(2006,9,15)).to_f/ 30
>> => 3.18572102628549
>>>> (DateTime.now - Date.new(2006,9,15)).to_f/30
>> => 3.18572174544174
>>>> (DateTime.now - Date.new(2006,9,15)).to_f /30
> 
>   Irb takes the latter as the beginning of a regular expression for the
> first argument of to_f:

...therefore IRB is still waiting for input. But you should see the a
prompt when you hit enter, with a different ending character (/ instead of
>) to indicate that IRB is still waiting for input.

>>> (DateTime.now - Date.new(2006,9,15)).to_f /30
> /
> ArgumentError: wrong number of arguments (1 for 0)
>         from (irb):10:in `to_f'
>         from (irb):10
>         from /usr/lib/ruby/1.8/rational.rb:520
> 
>   Cheers,
> 
> 	Vince



-- 
Ken Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/