scraper.rb

# gem
require 'nokogiri'

# stdlib
require 'open-uri'
require 'csv'

puts "== SCRAPING"
doc = Nokogiri::HTML(open('http://hobbsc.sdf-us.org'))

title_text = doc.css('title').children.first.content
h1_text = h1 = doc.css('h1').children.first.content

puts "== GENERATING CSV"
CSV.open("/Users/christopher/tmp/file.csv", "wb") do |csv|
  csv << ["title", "header 1"]
  csv << [title_text, h1_text]
end

setup.txt

create any 'ol directory:

mkdir scraper

cd into that directory and make yourself a file:

cd scraper
touch scraper.rb

install nokogiri and pry (from anywhere):

gem install nokogiri pry

fire up pry with 'pry' and you're ready to rock.