ruby - Ruby unpack array to block

Question

settings = [ ['127.0.0.1', 80], ['0.0.0.0', 443] ]

How can I do:

settings.each do |ip, port|  
    ...
end

Instead of:

settings.each do |config|  
    ip, port = *config
    ...
end

Answer 1

您的第一个示例有效，因为 Ruby 将解构块参数。有关在 ruby​​ 中解构的更多信息，请参阅这篇文章。

Answer 2

您正在寻找的方法是 Array#map

settings = [ ['127.0.0.1', 80], ['0.0.0.0', 443] ]
settings.map { |ip, port| puts "IP: #{ip} PORT: #{port}"  } 

这将返回
#// => IP: 127.0.0.1 PORT: 80
#// => IP: 0.0.0.0 PORT: 443