28 lines
917 B
Markdown
28 lines
917 B
Markdown
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---
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title: Learn About Ruby Arrays
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localeTitle: 了解Ruby数组
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---
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### 基本：
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* 数组是存储在`<a href='http://ruby-doc.org/core-2.2.0/Array.html' target='_blank' rel='nofollow'>]`括号内的索引项列表。
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* Ruby使用从零开始的索引。这意味着数组中的第一项存储在索引号`0` ，然后第二项存储在索引号`1` ，依此类推，对于存储在数组中的每个附加项，值增加1。
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* 可以使用`[]`或`Array.new`语法创建数组。
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* Ruby有许多构建方法来对数组执行操作，例如反转或查找存储在数组中的元素。
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## 例子：
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```
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arr = [1,2,3]
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# is equivalent to:
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arr = Array.new(3)
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arr[0] = 1
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arr[1] = 2
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arr[2] = 3
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# is also equivalent to:
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arr = Array(1..3)
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# All three of these examples return:
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[1,2,3]
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```
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## 参考文献：
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* [数组的官方Ruby文档](https://docs.ruby-lang.org/en/2.0.0/Array.html) 。
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