Études for Erlang

Étude 6-2: Iteration through Lists (More Practice)

Add two more functions to the stats module:

maximum/1, which is just the same as minimum/1, but don’t forget—as I did—to reverse the direction of your test for “smaller” to become a test for “larger.” (This function also already exists as lists:max/1.)

range/1, which takes a list of numbers as its argument and returns a list of two numbers: the minimum and maximum entries in the list.

1> c(stats).
{ok,stats}
2> N = [4, 1, 7, -17, 8, 2, 5].
[4,1,7,-17,8,2,5]
3> stats:maximum(N).
8
4> stats:range(N).
[-17,8]

See a suggested solution in Appendix A.