function fib does not exist | Elixir Language | Page 1

#

why ```elixir
defmodule FibCache do
defp cache do
Agent.start_link(fn -> %{} end)
end

defp fetch(pid, k) do
    Agent.get(pid, &(&1[k]))
end

defp put(pid, k, v) do
    Agent.update(pid, &(Map.put(&1, k, v)))
end

defp fib(cache_pid, n) when n >= 0 do
    cached_res = fetch(cache_pid, n)
    if !cached_res do
        res = if n <= 1,
                do: n,
                else: fib(n-1) + fib(n-2)
        put(cache_pid, n, res)
        res
    else
        cached_res
    end
end

def makefib do
    {:ok, pid} = cache()
    &(fib(pid, &1))
end

end

fib = FibCache.makefib

IO.puts Enum.map(1..20, fib)
gives this

** (CompileError) jdoodle.exs:19: undefined function fib/1
(elixir 1.12.2) src/elixir_locals.erl:114: anonymous fn/3 in :elixir_locals.ensure_no_undefined_local/3
jdoodle.exs:1: (file)

#

oh i found it

#

nvm

#function fib does not exist