metasploit-framework

https://github.com/rapid7/metasploit-framework

Ruby

Metasploit Framework

Net::DNS::Packet#each_mx

Iterate for every exchange record in the +answer+ section 
of a Net::DNS::Packet object.

  packet.each_mx do |pref,name|
    puts "Mail exchange #{name} has preference #{pref}"
  end

Source | Google | Stack overflow

Edit

git clone [email protected]:rapid7/metasploit-framework.git

cd metasploit-framework

open lib/net/dns/packet.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Net--DNS--Packet-each_mx-for-pr

# Commit to git

git add lib/net/dns/packet.rbgit commit -m "better docs for Net::DNS::Packet#each_mx"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Net--DNS--Packet-each_mx-for-pr

hub pull-request

# Celebrate!