From: "trans.  (T. Onoma)" <transami@...>
Date: 2004-10-06T11:18:50+09:00
Subject: Re: Range behavior (Re: [RCR] New [] Semantics)

On Tuesday 05 October 2004 08:19 pm, Yukihiro Matsumoto wrote:
> Hi,
>
> I changed the subject.
>
> In message "Re: [RCR] New [] Semantics"
>
>     on Tue, 5 Oct 2004 18:19:09 +0900, "trans.  (T. Onoma)" 
<transami@runbox.com> writes:
> |I occurs to me that the angry villagers might be confused. The example of
> | the never ending
> |
> |  (0..(10.0/0)).member?(4)
> |
> |comes to mind. Why would this be an infinite loop?
>
> 'member?' should have terminated iteration as soon as it find the
> value.  I will fix.
>
> Range serves as both continuous and discrete interval of values.
> 'member?' treat it as discrete, whereas 'include?' treat it as
> continuous.

irb(main):001:0> a = 0..2
=> 0..2
irb(main):002:0> a.include?(1)
=> true
irb(main):003:0> a.include?(1.5)
=> true
irb(main):004:0> a = a.to_a
=> [0, 1, 2]
irb(main):005:0> a.include?(1)
=> true
irb(main):006:0> a.include?(1.5)
=> false

:(  

T.