defmodule Main do def main() do http_map = %{"type" => "http", "http" => "http config"} tcp_map = %{"type" => "tcp", "tcp" => "tcp config"} handle(http_map) handle(tcp_map) end def handle(map=%{"type" => "http"}) do IO.puts "http handler: " <> map["http"] end def handle(map=%{"type" => "tcp"}) do IO.puts "tcp handler: " <> map["tcp"] end end Main.main