tomjadams/gist:70639

Forked from DylanFM/gist:70625

Created February 26, 2009 03:44

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Without the destructive update

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gistfile1.rb

	# sans destructive update
	def f(rss, n)
	rss.inject(0) {\|acc, rs\| rs.include?(n) ? acc + 1 : acc}
	end

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