16 lines
345 B
Erlang
16 lines
345 B
Erlang
-module(shop).
|
|
-export([cost/1, total/1]).
|
|
|
|
%% ShoppingList = [{oranges,4},{newspaper,1},{apples,10},{pears,6},{milk,3}]
|
|
cost (oranges) -> 5;
|
|
cost (newspaper) -> 8;
|
|
cost (apples) -> 2;
|
|
cost (pears) -> 9;
|
|
cost (milk) -> 7.
|
|
|
|
total(ShoppingList) ->
|
|
lists:sum(
|
|
lists:map(fun ({Item, Count}) ->
|
|
Count * cost(Item) end,
|
|
ShoppingList)).
|