From: "Iñaki Baz Castillo" <ibc@...>
Date: 2009-09-02T07:49:53+09:00
Subject: Re: accessing hash values

El Miércoles, 2 de Septiembre de 2009, Sean Stephenson escribió:
> Hi all, this is my first post to the Ruby Forum. Cheers. And thanks for
> helping out a newb.
> 
> Quesiton: How do you access multiple values from a hash?
> 
> For Example, I have a hash of computer names, and their associated user.
> 
>   the_system = {
>     "computer-01"=>"jill",
>     "computer-02"=>"jack",
>     "computer-03"=>"bob"
>   }
> 
> 
> If I want to access the user of one machine, this works great:
> 
>   puts the_system["computer-01"]
>   =>jill
> 
> 
> But how do I return multiple user names? (The below throws an error:
> 'wrong number of arguments'.)
> 
>   puts the_system["computer-01", "computer-02"]

the_system.values_at("computer-01","computer-02")

=> ["jill", "jack"]


Note that it returns an Array.


Note: Tested in Ruby1.9 but not in 1.8.


-- 
Iñaki Baz Castillo <ibc@aliax.net>