From: Damphyr <damphyr@...>
Date: 2005-11-21T05:08:36+09:00
Subject: Re: Passing the class as an argument

Damphyr wrote:
> I'm too lazy to figure it out (and a bit hangover).
> I have several collections of objects (read over an OLE API) that I 
> transform to arrays of ruby objects.
> Against the DRY religion I ended up with several methods similar to the 
> following:
> 
> def get_processors col
>     ar=Array.new
>     count=col.Count
>     1.upto(count){|i|
>         ar<<Processor.new(col.GetAt(i))
>     }
>     return ar
> end
> 
> Now, this begs for the working equivalent of
> 
> def get_collection col, _class
>     ar=Array.new
>     count=col.Count
>     1.upto(count){|i|
>         ar<<_class.new(col.GetAt(i))
>     }
>     return ar
> end
> 
> How do I do it?
> (I do know how do it - I think . It's just that the hangover is not 
> helping the search functions of my brain :) )
> 
> i.e. this would do what I want
> def get_collection col, _class
>     ar=Array.new
>     count=col.Count
>     1.upto(count){|i|
>         ar<<instance_eval(_class+".new(col.GetAt(i))")
>     }
>     return ar
> end
> 
> ...but, is there another way?
And to clarify (it's just impossible to concentrate today :( ).
Ideally I would like to call

	get_collection(ole_collection,Processor)

which looks nicer than

	get_collection(ole_collection,"Processor")
Cheers,
V.-
-- 
http://www.braveworld.net/riva

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