如何将设置保存为外部文件中的哈希？

Can I somehow use this

我可以以某种方式使用它

settings = { 

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

in a external file as settings?

在外部文件中作为设置？

How can I include this into my script?

如何将其包含在我的脚本中？

3 个解决方案

#1

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

在Ruby中存储配置数据的最常用方法是使用YAML：

settings.yml

settings.yml中

user1:
  path: /
  days: 5

user2:
  path: /tmp/
  days: 3

Then load it in your code like this:

然后将其加载到您的代码中，如下所示：

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

You can create the YAML file using to_yaml:

您可以使用to_yaml创建YAML文件：

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

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

也就是说，你也可以使用load包含直接的Ruby代码：

load "settings.rb"

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:

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：

settings.rb

settings.rb

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

Then load it thus:

然后加载它：

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

#2

you can also use Marshal

你也可以使用Marshal

settings = {
   'user1' => { 'path' => '/','days' => '5' },
   'user2' => { 'path' => '/tmp/','days' => '3' }
}
data=Marshal.dump(settings)
open('output', 'wb') { |f| f.puts data }
data=File.read("output")
p Marshal.load(data)

#3

A really simple one is to use eval.

一个非常简单的方法是使用eval。

config.txt

的config.txt

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

program.rb

program.rb

configuration = eval(File.read("./config.txt"))
puts configuration['user1']

#1