From: Ezra Zygmuntowicz <ezmobius@...>
Date: 2007-07-12T06:35:36+09:00
Subject: Re: Returning part of a hash


On Jul 11, 2007, at 2:27 PM, Craig Demyanovich wrote:

>> class Hash
>>    # lets through the keys in the argument
>>    # >> {:one => 1, :two => 2, :three => 3}.pass(:one)
>>    # => {:one=>1}
>>    def pass(*keys)
>>      self.reject { |k,v| ! keys.include?(k) }
>>    end
>>
>>    # blocks the keys in the arguments
>>    # >> {:one => 1, :two => 2, :three => 3}.block(:one)
>>    # => {:two=>2, :three=>3}
>>    def block(*keys)
>>      self.reject { |k,v| keys.include?(k) }
>>    end
>>
>> end
>
>
> Ezra,
>
> Since you're adding the #pass and #block methods to Hash and Hash  
> already
> has a #keys method, is there a conflict between the *keys parameter  
> to #pass
> and #block and the #keys method on Hash?
>
> Thanks,
> Craig


	There is not a conflict as it does do what's advertised, but it's  
probably a good idea to change the name anyways, thanks for pointing  
that out.


Cheers-
-- Ezra Zygmuntowicz 
-- Lead Rails Evangelist
-- ez@engineyard.com
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