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evantravers/p3.ex

Created August 21, 2018 17:09
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p3.ex
def sieve(n) when is_integer(n), do: sieve(Enum.to_list(2..n), [1])
def sieve([], result), do: Enum.reverse(result)
def sieve([prime|tail], result) do
tail
|> Enum.reject(& rem(&1, prime) == 0)
|> sieve([prime|result])
end
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