Simple example web scraping with Ruby for beginner

gistfile1.txt

require 'net/http'
require 'nokogiri'

# HTTP Client
url = 'https://www.w3schools.com'
response = Net::HTTP.get_response(URI(url))

if response.code != "200"
    puts "Error: #{response.code}"
    exit
end

# HTML Parser
doc = Nokogiri::HTML(response.body)
doc.css('#subtopnav a').each do |node|
   print(node.content + "\n") 
end

Text explanation: web Scraping with Ruby for beginner