From: Robert Klemme <shortcutter@...>
Date: 2008-02-12T23:12:48+09:00
Subject: Re: nested hash from array of paths

2008/2/12, Phrogz <phrogz@mac.com>:
> On Feb 11, 10:00 pm, Phrogz <phr...@mac.com> wrote:
> > array.each{ |path|
> >   sub = auto_hash
> >   path.split( "/" ).each{ |dir| sub[dir]; sub = sub[dir] }
> > }
>
> Bah, of course that can be written as:
>
> array.each{ |path|
>   sub = auto_hash
>   path.split( "/" ).each{ |dir| sub = sub[dir] }
> }

Or even

array.each{ |path|
 path.to_enum(:split, "/" ).inject(auto_hash){ |sub, dir| sub[dir] }
}

Full credits go to you for this line alone:

auto_hash = Hash.new{ |h,k| h[k] = Hash.new &h.default_proc }

Never occurred to me to use this nice one line approach instead of the
usual two line version (first create block then use it).  Thanks a
lot, this is really a gem!

Kind regards

robert

-- 
use.inject do |as, often| as.you_can - without end