抱歉，这可能是一个菜鸟问题。这个 (economic.rb) 是一个解析一些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，要运行它，我会这样做
ruby economic.rb
但是， File.open 将 ARGV[0] 作为参数。运行脚本时如何将 xml 文件 ( data.xml ) 传递到该文件中。
经济.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