33 lines
988 B
Markdown
33 lines
988 B
Markdown
---
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title: Learn About Ruby Hashes
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localeTitle: 了解Ruby Hashes
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---
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### 基本：
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* Ruby散列与Python等语言中的Javascript对象或词典相当。
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* 散列包含`key: value`对存储的项目。
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* 可以使用以下方法创建Ruby哈希：
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* `my_hash = {}`
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* `my_hash = Hash.new`
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* Ruby中内置了许多方法来查找和更新哈希值。
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## 例子：
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```
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my_hash = {'name' => 'Batman', 'age' => 25}
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# is equivalent to:
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my_hash = Hash.new
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my_hash<a href='http://www.randomhacks.net/2007/01/20/13-ways-of-looking-at-a-ruby-symbol/' target='_blank' rel='nofollow'>'name'] = 'Batman'
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my_hash['age'] = 25
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# Both of these examples return:
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{"name"=>"Batman", "age"=>25}
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# here is an alternative way to create the array:
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{name: 'Batman', age: 25}
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# this example return:
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{:name=>"Batman", :age=>25}
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# learn more about [symbols here</a>
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```
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## 参考文献：
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* [哈希的官方Ruby文档](http://ruby-doc.org/core-2.2.0/Hash.html) 。 |