moro/gist:1300961

## gistfile1.rb
class Array
  def to_proc
    m, args = self
    lambda {|x| x.send(m.to_sym, *args) }
  end
end

p [{:a => 1}].find(&[:key?, :a]) #=> {:a => 1}
p [{:a => 1}].find(&[:key?, :b]) #=> nil
	class Array
	def to_proc
	m, args = self
	lambda {\|x\| x.send(m.to_sym, *args) }
	end
	end

	p [{:a => 1}].find(&[:key?, :a]) #=> {:a => 1}
	p [{:a => 1}].find(&[:key?, :b]) #=> nil