From: Stefano Crocco <stefano.crocco@...>
Date: 2009-01-08T01:14:00+09:00
Subject: Re: Puzzling behaviour with range...

Alle Wednesday 07 January 2009, Raphael Clancy ha scritto:
> Hi all!
>
> I've been over (some of) the documentation, and I can't figure this one
> out, can anyone tell me what range is expecting? And, why it's behavior
> is different from other numerics?
>
> $ ruby -v
> ruby 1.8.6 (2007-09-24 patchlevel 111) [i486-linux]
> $ irb
> irb(main):001:0> 1.class
> => Fixnum
> irb(main):002:0> 3.14.class
> => Float
> irb(main):003:0> 1..4.class
> ArgumentError: bad value for range
>         from (irb):3
>         from :0
> irb(main):004:0> (1..4).class
> => Range
> irb(main):005:0>
>
> Thanks!

The point is that 1..4.class is parsed as 1..(4.class), that is 1..Fixnum 
which, of course, isn't a valid range.

Stefano