42 lines
930 B
Markdown
42 lines
930 B
Markdown
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---
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title: Lists
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localeTitle: 清单
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---
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## 清单
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在Elixir中，列表是由方括号内的值组成的数据结构。列表中的值可以是任何类型。
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```elixir
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iex> [1, "string", true]
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[1, "string", true]
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```
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## 不变性
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Elixir中的数据结构是不可变的，因此在List上执行的任何操作都将返回一个新列表，保留原始列表。
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```elixir
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iex> list = [1, "string", true]
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[1, "string", true]
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iex> list ++ [2]
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[1, "string", true, 2]
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iex> list
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[1, "string", true]
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```
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## 头和尾
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可以使用`hd/1`和`tl/1`运算符轻松访问列表的头部（第一个元素）和尾部（剩余值）。
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```elixir
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iex> list = [1, "string", true]
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iex> hd(list)
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1
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iex> tl(list)
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["string", true]
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```
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#### 更多信息：
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* [elixir-lang.org |递归](https://elixir-lang.org/getting-started/basic-types.html#linked-lists)
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* [hexdocs |枚举](https://hexdocs.pm/elixir/List.html)
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