From: Robert Dober <robert.dober@...>
Date: 2008-06-24T17:17:19+09:00
Subject: Re: Faking named parameters and enforcing required params

On Tue, Jun 24, 2008 at 8:12 AM, Greg Willits <lists@gregwillits.ws> wrote:
Maybe something like

class Hash
   def require_all_keys *keys
      keys.all?{ |k| has_key? k } or raise ArgumentError # better
doing an each here and raise an exception which argument was missing
of course, but I guess you got the idea;)
  end
  def provide_defaults defaults={}
     defaults.each_pair{ |nk,nv|
        self[nk]=nv unless has_key? nk
     }
  end
end

def whatever params={}
    params.require :size, :age
    params.provide_defaults :language => "en", :id => 42

end

HTH

Robert

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---
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