From: Joshua Ballanco <jballanc@...>
Date: 2008-09-15T09:04:16+09:00
Subject: Re: Passing a method call into a method

Glenn wrote:
> class Array
>   def hash_of_indexes
>     if self.empty?
>       'The array is empty.'
>     else
>       h = {}
>       self.each_with_index { |e, i| h.include?(e.to_f) ? h[e.to_f] << i 
> : h[e.to_f] = [i] }
>       h
>     end
>   end
> 
>   def indexes_of
>     self.empty? ? 'The array is empty.' : hash_of_indexes[self.min]
>   end
> end

Use send, as in:

class Array
  def indexes_of(function)
    self.empty? ? 'The array is empty.' : 
hash_of_indexes[self.send(function)]
  end
end

puts [1, -100, -200.0, 1000000000000.12, 3, 1, -100, -100, 
-200].indexes_of(:min)
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