gistfile1.rb

file = File.open('links.txt', 'rb')
contents = file.read

links = {}

contents.scan(/(http.*); (\d{1,2}.\d{1,2}.\d{4})/).each do |pattern|
  links[pattern[0]] = pattern[1]
end

links.sort.each do |k, v|
  puts "#{k}; #{v}"
end