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

Your first example works because Ruby will destructure block arguments. See this article for more information on destructuring in ruby.

Answer 2

The method you're looking for is Array#map

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

which will return
#// => IP: 127.0.0.1 PORT: 80
#// => IP: 0.0.0.0 PORT: 443