Erlang lists:index_of function?

Question

I\'m looking for an Erlang library function that will return the index of a particular element in a list.

So, if

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Answer 1

I think the writer makes a valid case. Here is my use case from a logging application. The objective is to check the severity of an error against the actions to be performed against various levels of error response.

get_index(A,L) ->
    get_index(A,L,1).
get_index(A,[A|_],N) ->
    N;
get_index(A,[_|T],N) ->
    get_index(A,T,N+1).

get_severity(A) ->
    Severity=[debug,info,warn,error],
    get_index(A,Severity).