Parsing and Storing

cvs.rb

require 'csv'

file = 'data/alunos.csv'

options = {headers: true, col_sep: ',', encoding: 'utf-8', force_quotes: true}

CSV.open(file, 'w', options) do |csv|
	csv << ['Nome', 'Email', 'Hobby']
	csv << ['Roger,', 'rogerpscott@gmail','coding']
	csv << ['Lincoln', 'antoniolincoln@live.com','eletrônica']
	csv << ['Adriano', 'wiermann@broou.com','surf']
end


# CSV.foreach(file, options) do |row|
# 	puts "#{row['Name']} #{row['Appearance']} #{row['Origin']}"
# end

json.rb

require 'json'

file = 'data/alunos.json'

data = {
	title: 'Alunos do Le Wagon',
	alunos: [
		{
			nome: 'Roger',
			email: 'rogerpscott@gmail',
			hobby: 'coding'

		},
		{
			nome: 'Lincoln',
			email: 'antoniolincoln@live.com',
			hobby: 'eletrônica',
			bairro: 'Jardim climax'
		}
	]

}

File.open(file, 'w') do |file|
  file.write(JSON.generate(data))
end



# data_serialized = File.read(file)
# data = JSON.parse(data_serialized)

# puts data['title']

# data['beers'].each do |beer|
# 	puts "Nome: #{beer['name']} - Aparência: #{beer['appearance']} - Origem: #{beer['origin']}"
# end

lastfm.rb

require 'json'
require 'open-uri'

puts "Diga um artista:"
artist = gets.chomp

api_url = URI.escape("http://ws.audioscrobbler.com/2.0/?method=artist.gettopalbums&artist=#{artist}&api_key=<YOUR_KEY>&format=json")

serialized_data = open(api_url).read
albums = JSON.parse(serialized_data)['topalbums']['album']

puts "----- Principais Álbuns de #{artist} --------"
position = 1
albums.first(5).each do |album|
  puts "#{position} - #{album['name']}"
  position += 1
end

scraping.rb

require 'open-uri'
require 'nokogiri'

def print_info(url_product)
	html = Nokogiri::HTML(open(url_product))
	title = html.search('h1').text

	price_int = html.search('.product-price .int').first

	if price_int.nil?
		puts "#{title} - Produto Esgotado"
	else
		price = "#{ price_int.text}#{ html.search('.product-price .dec').first.text}"
		puts "#{title} - R$ #{price}"
	end
end


url_category = 'https://www.walmart.com.br/categoria/telefonia/smartphones/?fq=C:4833/4835/4845/&fq=B:146&PS=20&mm=100'

html = Nokogiri::HTML(open(url_category))

html.search('.product-link').each do |link|
	url_product = "https://www.walmart.com.br#{link['href']}"
	print_info(url_product)
end