From: Oliver Saunders <oliver.saunders@...>
Date: 2008-07-11T11:03:04+09:00
Subject: Re: Map with &:method_name

ara.t.howard wrote:
> On Jul 10, 2008, at 3:11 PM, Oliver Saunders wrote:
> 
>> I see this a lot but it doesn't work for me in IRB. Is a gem  
>> required or
>> something?
>>
>>>> [1,2,3].map(&:to_s)
>> TypeError: wrong argument type Symbol (expected Proc)
>>        from (irb):2
> 
> 
> it's rails - basically
> 
> 
> class Symbol
>    def to_proc
>      sym = self
>      lambda{|obj| obj.send sym}
>    end
> end
> 
> a @ http://codeforpeople.com/

OK thanks guys. I found the actual definition:

class Symbol
  def to_proc
    Proc.new { |*args| args.shift.__send__(self, *args) }
  end
end


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