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Erlang Programming/Modules
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Erlang modules
Each Erlang Programming source file
utility.erl
is required to be a separate module. Modules are created with the module statement.
-module(utility). % 1
-export([rotate/1]). % 2
% 3
rotate([H|T]) -> % 4
T ++ [H]. % 5
compile with
c(utility).
run with
utility:rotate([1,2,3]).
and get
[2,3,1].
"utility" is the module created by the file utility.erl
utility functions like rotate can be imported elsewhere with:
-import(utility).
so now we do not need to use the "utility:" prefix.
Importing modules is not generally recommended. This is very similar to python and Java imports.