如何将设置保存为外部文件中的散列? [英] How do I save settings as a hash in a external file?

问题描述

我能以某种方式使用它吗

Can I somehow use this

settings = { 

   'user1' => { 'path' => '/','days' => '5' },
   'user2' => { 'path' => '/tmp/','days' => '3' }
}

在外部文件中作为设置?

in a external file as settings?

如何将其包含在我的脚本中?

How can I include this into my script?

推荐答案

在 Ruby 中存储配置数据最常见的方式是使用 YAML:

The most common way to store configuration data in Ruby is to use YAML:

settings.yml

user1:
  path: /
  days: 5

user2:
  path: /tmp/
  days: 3

然后像这样在你的代码中加载它:

Then load it in your code like this:

require 'yaml'
settings = YAML::load_file "settings.yml"
puts settings.inspect

您可以使用 to_yaml 创建 YAML 文件:

You can create the YAML file using to_yaml:

File.open("settings.yml", "w") do |file|
  file.write settings.to_yaml
end

<小时>

也就是说，您也可以使用 load 包含直接的 Ruby 代码:

---

That said, you can include straight Ruby code also, using load:

load "settings.rb"

但是，您无法访问文件外的局部变量，因此您必须更改代码以使用实例变量或全局变量:

However, you can't access local variables outside the file, so you would have to change your code to use an instance variable or a global variable:

settings.rb

SETTINGS = { 
 'user1' => { 'path' => '/','days' => '5' },
 'user2' => { 'path' => '/tmp/','days' => '3' }
}
@settings = { 'foo' => 1, 'bar' => 2 }

然后这样加载:

load "settings.rb"
puts SETTINGS.inspect
puts @settings.inspect

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