From: dblack@...
Date: 2007-01-22T00:31:29+09:00
Subject: Re: Hash pairs at?

Hi --

On Mon, 22 Jan 2007, Phrogz wrote:

> Phrogz wrote:
>> Trans wrote:
>>> Seems like there should be a mehtod for this:
>> class Hash
>>   def entries( *keys )
>>     self.class[ *keys.zip( values_at( *keys ) ).flatten ]
>>   end
>> end
>
> Oh, and yes: I'd like a method like this in the core, also. Preferably
> with a more elegant, faster implementation than the above. I find this
> quite useful sometimes. A recent example that comes to mind is taking
> the params hash in Rails and specifying a specific subset of the
> populated values to pass on to another method.

I'll put in a plug here for flattenx, which lets you flatten by any
number of levels so that you could do the above without the
over-flattening vulnerability.

http://raa.ruby-lang.org/project/flattenx/


David

-- 
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