一、赋值时匹配
原子匹配
atom = atom % atom
another = another % another
atom = another % exception error
变量匹配
Var = 2. % 2
Var = 3 - 1. % 2
Var = 1. % exception error
元组匹配
Attr = {name, sloger}. % {name, sloger}
{name, Name} = Attr. % {name, sloger}
Name. % sloger
列表匹配
Langs = [perl, python, ruby, erlang].
[Head | Tail] = Langs.
Head. % perl
Tail. % [python, ruby, erlang]
参数匹配
sum([]) -> 0;
sum([H|T]) -> H + sum(T).
sum([1, 2, 3]). % 6
记录匹配
%% record(post, {title, slug, body, author}).
Post = #post{title = "Pattern Match in Erlang",
slug = "pattern-match-in-erlang",
body = "Bla bla bla...",
author = sloger}.
#post{title = Title, slug = Slug} = Post.
