Finding a value in {key, value} list in Erlang

I'm new to Erlang and maybe I just missed this issue in the tutorial though it is trivial. Let's say, I have a list of {Key, Value} pairs gotten from erlang:fun_info/1. I want to know function arity, the rest of the list is no interest to me. So I write something like: ``` find_value( _, [] ) -> nothing; find_value( Key, [{Key, Value} | _] ) -> Value; find_value( Key, [_ | T] ) -> find_value( Key, T). ``` And then do: ``` find_value( arity, erlang:fun_info( F )). ``` I works fine, but should something like find_value be a too common routine to write it? I failed to find its' analogue in BIFs though. So the question is: it there a nice elegant way to get a value for a key from a list of {key, value} tuples?