对不起,这可能是一个noob问题。这个(economic.rb)是一个解析世界经济数据的脚本。我不确定如何将xml文件传递给它。通常,为了运行这个我会做
ruby economic.rb
但是,File.open将ARGV [0]作为参数。如何在运行脚本时将xml文件( data.xml )传递给该文件。
economic.rb
require 'rubygems'
require 'nokogiri'
File.open(ARGV[0]) do |f|
xml_doc = Nokogiri::XML::Document.parse(f)
countries = xml_doc.css('country')
most_populous = countries.max_by {|node| node['population'].to_i}
puts "The most populous country in 1996 was #{most_populous['name']} with a population of #{most_populous['population']}"
puts
puts "The five countries with the highest inflation rate in 1996 were:"
countries.sort_by {|country| -(country['inflation'] || 0).to_f} [0..4].each do |country|
puts " #{country['name']} - #{country['inflation']}%"
end
continent_info = countries.group_by {|country| country['continent']}
puts
puts "The continents and their countries in 1996 were:"
continent_info.keys.sort.each do |continent|
continent_info[continent].sort_by {|country|
country['name']}.each do |country|
puts " #{country['name']}"
end
end
答案 0 :(得分:5)
你可以跑:
ruby economic.rb data.xml