Études for Erlang

Étude 9-1: try and catch

Update the stats module that you wrote in Étude 7-3 so that it will catch errors in the minimum/1, maximum/1, mean/1 and stdv/1 functions.

Here is some sample output.

1> c(stats).
{ok,stats}
2> stats:minimum([]).
{error,badarg}
3> stats:mean([]).
{error,badarith}
4> stats:mean(["123", 456]).
{error,badarith}
5> stats:stdv([]).
{error,badarith}

See a suggested solution in Appendix A.