From: John Lane <ruby-forum@...>
Date: 2010-04-17T07:09:25+09:00
Subject: Re: Blocks and local variable creation

Rick Denatale wrote:
> 
> I think you meant rights_held instead of rights_hash in that second 
> line.
>
Yes I did' Serves me right for doing two things at once ;)

> 
> My inclination would be to do something like
> 
> perform_something_with_rights(rights_for_item(rights_hash, item))
> 
> Let the thing which needs the rights deal with what rights it has, and
> an empty collection(array) of rights seems a better representation of
> empty rights than nil.
>
Yes, I agree. I'm convinced of the argument for returning the same type. 
Makes a lot of sense when you come to think of it.

I found the explanation from Jesus about (&:first) very interesting but 
I'm not sure I think it improves readability. I read these:
http://pragdave.pragprog.com/pragdave/2005/11/symbolto_proc.html
http://www.ruby-forum.com/topic/161089

Personally I think the Symbol#to_proc approach is less idomatic than the 
long hand version but I guess it's a matter of personal taste.

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