From: Andrew Timberlake <andrew@...>
Date: 2009-01-15T17:59:34+09:00
Subject: Re: A Hash problem

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On Thu, Jan 15, 2009 at 10:23 AM, Valentino Lun <sumwo@yahoo.com> wrote:

> Dear all
>
> I want to build a hash which store the values from database, but failed.
> Please give me some hints please. Thank you.
>
> services table
> h_code       s_code       status
> AHN          BBS          3
> AHN          MBS          1
> AHN          HMS          1
> CMC          CRS          1
> CMC          CPS          1
> CMC          BTNS         1
> GH           CRS          1
> GH           CPS          1
>
>
> My expectation
> all = {"AHN" => {"BBS" => 3, "MBS" => 1, "HMS" => 1}
>       "CMC" => {"CRS" => 1, "CPS" => 1, "BTNS" => 1}
>       "GH" => {"CRS" = 1, "CPS" => 1}
>      }
>
>
> all = {}
> Service.find(:all).each do |s|
>   # How to do here?
>   # I try all[s.h_code][s.s_code]=s.status, but not work
> end
>
> Thank you very much
>
> Valentino
> --
> Posted via http://www.ruby-forum.com/.
>
>
Try the following:

#Create a new hash where every key has a default entry of an empty hash
(hash of hashes)
all = Hash.new{|h,k| h[k] = {}}
Service.find(:all).each do |s|

end
h_code       s_code       status

-- 
Andrew Timberlake
http://ramblingsonrails.com
http://www.linkedin.com/in/andrewtimberlake

"I have never let my schooling interfere with my education" - Mark Twain

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