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burke/gist:68375

Created February 22, 2009 07:09
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gistfile1.rb
# Ruby 1.8.7
lambda{|n| (fac=lambda{|n| n.zero? ? 1 : n * fac.call(n-1)}).call(n) }
# Ruby 1.9
->(n){(fac=->(n){n.zero? ? 1 : n * fac.(n-1)}).(n)}
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