From: Oliver Dain <odain2@...>
Date: 2003-09-05T10:48:24+09:00
Subject: Re: Difference between .. and ... in boolean ranges

Ben Giddings wrote:

> Sean O'Dell wrote:
>> Try: if (3..5) === x
> 
> That'll probably work... but I'm curious to know if Oliver Dain's
> method
>   is supposed to work:
> 
> if (x==3)..(x==5)
> 
> and
> 
> if (x==3)...(x==5)
> 
> I'm surprised that they work at all, and I'm curious if the fact
> they work in some way is a fluke, or if it was a conscious decision
> to try to
> let them work like that.  I'd expect a syntax error, but then again,
> ranges as objects confuse me.  :)
> 
> Ben

Its my understanding that its not a fluke but a design decision.  The 
main reason for doing it, I think, is for regex's.  It allows you to 
say things like:


while gets
        print if /foo/../bar/
end

e.g. print all lines between foo and bar.  While Sean's solution works 
for numbers it doesn't work for regular expressions and that was my 
application of interest (I gave a numerical example because it was 
easier to understand).