12 lines
227 B
Text
12 lines
227 B
Text
def sdaccum
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n, sum, sum2 = 0, 0.0, 0.0
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->(num : Int32) do
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n += 1
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sum += num
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sum2 += num**2
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Math.sqrt( (sum2 * n - sum**2) / n**2 )
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end
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end
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sd = sdaccum
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[2,4,4,4,5,5,7,9].each {|n| print sd.call(n), ", "}
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