Erlang (programming language)/Tutorials/Modules: Difference between revisions
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imported>Eric Evers (New page: =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). ...) |
imported>Eric Evers |
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| Line 8: | Line 8: | ||
-module(utility). % 1 | -module(utility). % 1 | ||
-export([rotate/0]). % 2 | -export([rotate/0]). % 2 | ||
-compile(export_all). | |||
% 3 | % 3 | ||
rotate([H|T]) -> % 4 | rotate([H|T]) -> % 4 | ||
Revision as of 19:11, 19 April 2008
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/0]). % 2
-compile(export_all).
% 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 else-where 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.