From: danfinnie@...
Date: 2007-02-20T10:56:21+09:00
Subject: Re: [Facets] Range#overlap?

I think that overlap? and within? are two different things, which I'm not sure you think from your email. Overlap? suggests, to me, that a subset of the things one range includes is the same as a subset of things that the other range includes. Within? suggests that all of one range is contained in a subset of the other range.

Otherwise, I do like both names and your implementation.

----- Original Message -----
From: Daniel Schierbeck 
Date: Monday, February 19, 2007 7:08 pm
Subject: [Facets] Range#overlap?
To: ruby-talk@ruby-lang.org (ruby-talk ML)

> (I'm sending this to the list because I think it has general interest.<BR>> Sorry if you disagree!)
> 
> Hi T. and the rest of you,
> 
> I was discussing[1] a method that tested whether one range overlaps
> another, and noticed that Facets has a somewhat funny implementation
> called #within?. I came up with this:
> 
> class Range
> def overlap? other
> include? other.first or other.include? first
> end
> end
> 
> It would seem to be simpler, and I really like the method name. 
> Can you
> see any errors? Feel free to add it to Facets if you wish to.
> 
> 
> Cheers,
> Daniel
> 
> 
> 1. http://opensoul.org/2007/2/13/ranges-include-or-overlap-with-
> ranges
> 
>