From: David Alan Black <dblack@...>
Date: 2002-04-26T22:34:00+09:00
Subject: Re: expand_path and overlap

Hello --

On Fri, 26 Apr 2002, Morris, Chris wrote:

> I'm wanting something similar to expand_path, but that will detect overlap.
> So given this:
>
>   expand_path("b/c/f", "/a/b/c/d/e")
>
> it would return:
>
>   "/a/b/c/f"
>
> expand_path currently returns:
>
>   "/a/b/c/d/e/b/c/f"
>
> No argument with expand_path -- a function that did what I wanted would not
> allow a user to navigate to /a/b/c/d/e/b/c/f from /a/b/c/d/e without
> specifying an absolute path ... but I think my version will suit my needs.
>
> So ... is there anything out there in Ruby land that does this already
> before I build this myself?

I find this an interesting puzzle.  Question:  what would this return:

   collapse_path("b/c/f", "/a/b/c/d/e/b/c/g/h")
   #^^^^^^^^^^^^ or whatever :-)

?


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav