From: Albert Schlef <albertschlef@...>
Date: 2008-05-02T23:24:41+09:00
Subject: Re: Extracting a value from an array

Simon Krahnke wrote:
> That's simply the wrong data structure for the task.
> So the question is: why not use a Hash?

(HTTP servers may return several headers having the same name, so I 
can't use a hash.)

Luc Heinrich wrote:
> Or, since you can pass a proc to the find method which
> gets called when nothing is found, this:
>
> content_type = headers.find(lambda {Hash.new}) { 
>      ... }.fetch(:value, nil)

Luc, thanks. But I don't think it's more elegant than ".find { cond } || 
{}".

Luc, tell me, why does find() accept this proc parameter? What is it 
useful for? Ok, I understand it calls it if no value found, but... we 
could do "|| expression" instead, couldn't we? Perhaps there is 
something here I miss?
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