tvl-depot/users/wpcarro/assessments/semiprimes/server/lib/server.ex

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

34 lines
564 B
Elixir
Raw Normal View History

defmodule Server do
@moduledoc """
Documentation for `Server`.
"""
@doc """
If `n` contains exactly two prime factors, return those prime factors;
otherwise, return nothing.
"""
def semiprime(n) do
case Cache.get(n) do
nil ->
case do_semiprime(n) do
nil ->
nil
res ->
Cache.put(n, res)
{:miss, res}
end
hit ->
{:hit, hit}
end
end
defp do_semiprime(n) do
case Math.factor(n) do
[_, _] = res -> res
_ -> nil
end
end
end