Opening same file names in multiple directories using Ruby - ruby

Question

Looking to do the following using Ruby:
Directory A and Directory B will have same number of XML files and also same filenames.
Step 1:
* Go into directory A (directory A has X number of XML files)
* Inside directory A, take the first XML file and save the file name and also open the file
Step 2:
* Go into directory B (directory B will have same number of XML files with the same filenames as directory A)
* Inside directory B, open the same XML filename that was saved and opened in directory A.
Step 3: (I've already completed this part) **
* Compare the two files (I've already completed this part)**
Step 4:
* Repeat this for ALL XML files in both directories.
I've tried a few things, but for some reason the loop is happening for each file and not once, also the second loop for Dir B is not executing:
id_dir = "#{Dir.pwd}"+"/id_responses"
ht_dir = "#{Dir.pwd}"+"/ht_responses"
Dir.foreach(id_dir) do |id_file|
next if id_file == '.' or id_file == '..'
id_file = File.open("#{id_dir}/#{id_file}", 'r')
doc1 = Nokogiri::XML::Document.parse(File.open(id_file))
Dir["#{Dir.pwd}"+"/ht_responses/#{id_file}"].each do |ht_file|
next if id_file == '.' or id_file == '..'
doc2 = Nokogiri::XML::Document.parse(File.open(ht_file))
end
end

Answer 1

No need to loop through the other dir, just see if a file with the same name exists there.
id_dir = "#{Dir.pwd}"+"/id_responses"
ht_dir = "#{Dir.pwd}"+"/ht_responses"
Dir.foreach(id_dir) do |id_file|
next if id_file == '.' or id_file == '..'
id_file_path = File.join(id_dir, id_file)
ht_file_path = File.join(ht_dir, id_file)
next unless File.exist?(ht_file_path)
doc1 = Nokogiri::XML::Document.parse(File.open(id_file_path, 'r'))
doc2 = Nokogiri::XML::Document.parse(File.open(ht_file_path, 'r'))
end