From: David Masover <ninja@...>
Date: 2009-03-29T13:49:02+09:00
Subject: Re: Dynamic object creation in ruby

Clash Fasn wrote:
> This works:
>
> john = eval("Master::Person").new("John")
>
> This fails:
>
> frank = Object.const_get("Master::Person").new("Frank")
>
> Does anyone know why the second way fails?
>   

Because there is no constant named Master::Person. There's a constant 
named Person inside the constant named Master. This is going to make a 
lot more sense by example:

Object.const_get('Master').const_get('Person').new('Frank')

For what it's worth, unless there's a reason to use strings, you may as 
well use symbols there:

Object.const_get(:Master).const_get(:Person).new('Frank')