From: James Coglan <jcoglan@...>
Date: 2009-08-18T22:28:04+09:00
Subject: Re: Bizarre Range behavior

--0015174764daa13a6c04716a7cd6
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

2009/8/18 Yukihiro Matsumoto <matz@ruby-lang.org>

> Hi,
>
> In message "Re: Bizarre Range behavior"
>     on Tue, 18 Aug 2009 21:31:38 +0900, Daniel DeLorme <dan-ml@dan42.com>
> writes:
>
> |That sounds nice and consistent, but why limit ourselves to numbers?
> |     ("y".."aa").to_a
> |should then generate ["y", "z", "aa"] since that's what String#succ
> |generates. Sounds like this could snowball into a nightmare of
> |incompatible changes.
>
> Indeed.  The issue is that it's not easily distinguishable whether
> a sequence using #succ from a string reaches to another, or not.
> If there's affordable scheme to implement, I'd love to check in.


For user-defined objects, the `<=>` method is used to determine whether the
end of a range has been reached or exceeded, and it seems like 1.8 does this
for strings (and numbers, of course). I prefer 1.8's consistent application
of this rule.

--
James Coglan
http://jcoglan.com

--0015174764daa13a6c04716a7cd6--