有流浪文件中引用變量的風格指南嗎？

Question

當我看着流浪文檔https://www.vagrantup.com/docs/networking/forwarded_ports.html它給出這樣一個例子：

Vagrant.configure("2") do |config| 
    config.vm.network "forwarded_port", guest: 2003, host: 12003, protocol: "tcp" 
    config.vm.network "forwarded_port", guest: 2003, host: 12003, protocol: "udp" 
end 

然而，下面也似乎是有效的：

單引號

Vagrant.configure("2") do |config| 
    config.vm.network 'forwarded_port', guest: 2003, host: 12003, protocol: "tcp" 
    config.vm.network 'forwarded_port', guest: 2003, host: 12003, protocol: "udp" 
end 

結腸前綴

Vagrant.configure("2") do |config| 
    config.vm.network :forwarded_port, guest: 2003, host: 12003, protocol: "tcp" 
    config.vm.network :forwarded_port, guest: 2003, host: 12003, protocol: "udp" 
end 

這些語法的區別是什麼？只有在變量爲like in puppet時才應使用雙引號？

什麼是冒號前綴語法？這是令人困惑的，因爲該行上的其他關鍵字後綴爲冒號。

有沒有Vagranfiles風格指南？

Answer 1

Vagrantfile是一個紅寶石腳本，所以它遵循紅寶石規則。

的主要優勢，使用雙引號一個是當你需要有string interpolation