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988 B
title | localeTitle |
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Learn About Ruby Hashes | 了解Ruby Hashes |
基本:
- Ruby散列与Python等语言中的Javascript对象或词典相当。
- 散列包含
key: value
对存储的项目。 - 可以使用以下方法创建Ruby哈希:
my_hash = {}
my_hash = Hash.new
- Ruby中内置了许多方法来查找和更新哈希值。
例子:
my_hash = {'name' => 'Batman', 'age' => 25}
# is equivalent to:
my_hash = Hash.new
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'
my_hash['age'] = 25
# Both of these examples return:
{"name"=>"Batman", "age"=>25}
# here is an alternative way to create the array:
{name: 'Batman', age: 25}
# this example return:
{:name=>"Batman", :age=>25}
# learn more about [symbols here</a>