gold.rb

#!/usr/bin/env jruby

require 'rexml/document'
require 'net/http'

doc = REXML::Document.new(Net::HTTP.get('dgcsc.org', '/goldprices2.xml'))
# Get current gram price in USD
grams_usd = doc.elements["GoldPrice/Price[@currencycode='USD']"].elements['Ask'].texts.first.to_s.to_f
grams_usd_rounded = sprintf('%.2f', grams_usd)
# Get current ounce price in USD
ounce_usd = sprintf('%.2f', grams_usd * 31.1034768)
puts "Current gold price is $#{ounce_usd}/ounce, $#{grams_usd_rounded}/gram"