From: Joel VanderWerf <joelvanderwerf@...>
Date: 2010-06-11T04:45:44+09:00
Subject: Re: Split an array of object by first letter

Greg Ma wrote:
> Hi,
> I have an array of brands and I need to split this array by brand name
> first letter. How can I do that?

["fz", "yt", "fu", "za", "zw", "yo", "zb"].group_by {|s|s[0,1]}
=> {"y"=>["yt", "yo"], "z"=>["za", "zw", "zb"], "f"=>["fz", "fu"]}