#---
# Excerpted from "Programming Ruby 3.2",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material,
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose.
# Visit https://pragprog.com/titles/ruby6 for more book information.
#---
require "open-uri"

url = "https://pragprog.com/titles/ruby5/programming-ruby-3-3-5th-edition/"
URI.open(url) do |f|
  puts f.read.scan(/<img class=".*?" src="(.*?)"/m).uniq[0,3]
end
