kballenegger/gist:f15484c5c3aaa7e69276 Secret

## gistfile1.rb
def sim(first, second)
  shared = $critics[first].keys.inject([]) {|a,k| a << k if $critics[second][k] }
  return 0 if shared.empty?
  sum = shared.map{|e| ($critics[first][e] - $critics[second][e]) ** 2 }.reduce(&:+)
  1/(1+Math.sqrt(sum))
end
	def sim(first, second)
	shared = $critics[first].keys.inject([]) {\|a,k\| a << k if $critics[second][k] }
	return 0 if shared.empty?
	sum = shared.map{\|e\| ($critics[first][e] - $critics[second][e]) ** 2 }.reduce(&:+)
	1/(1+Math.sqrt(sum))
	end