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zakuroishikuro/fibonacci.rb

Last active August 29, 2015 13:57
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フィボナッチ数列
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fibonacci.rb
def fibonacci(num)
[1,1].tap{|a|(num-2).times{a<<a[-2,2].inject(:+)}}[0,num]
end
#p fibonacci 10 #=> [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
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