From: Peter Hickman <peterhickman386@...>
Date: 2010-07-13T18:01:42+09:00
Subject: Re: I'm trying to get the keys, but why values appear?

If you want the keys only you can do this
"personal_information.keys.each do |key|" or
"personal_information.each_key do |key|"

This, however, "personal_information.each do |key|" returns each
element of the hash as an array in the form [key, value]

Look here for the documentation (
http://www.ruby-doc.org/core/classes/Hash.html ), in fact this should
be the first place you look when you have a problem.