From: Gary Wright <gwtmp01@...>
Date: 2007-03-30T10:27:02+09:00
Subject: Re: code too hashy, I think


On Mar 29, 2007, at 8:58 PM, James Edward Gray II wrote:
> # or group the data by size
> by_size = all_stuff.inject(Hash.new { |size, a| size[a] = [] }) do | 
> grouped, s|
>   grouped[s.size_code] << s
>   grouped
> end
> pp by_size

Set has a nice method, classify, that can help with this if you aren't
concerned with duplicates.

require 'set'

by_size = all_stuff.to_set.classify { |s| s.size_code }


I'm surprised classify isn't part of Enumerable.  It is a  
generalization of
Enumerable#partition.


Gary Wright