I need to rename part of the name of multiple files, as per user's indication

Question

Current name of files:

Empty_test-one.txt, Empty_test-two.txt, Empty_test-three.txt

I just want to rename the word Empty. My code so far:

puts "Indicate new name of files":
new_name = gets.chomp

# Look for the specific files
Dir.glob("*.txt").each do |renaming| 
  # Renaming of files starts, but not on every file
  File.rename(renaming, new_name + ".txt") 

I'm currently unable to rename each individual file and keep the second part of the file (test-one, test-two, test-three).

Could you please help me?

Answer 1

old_part = "Empty"

puts "Indicate new name of files":
new_name = gets.chomp

# Look for the specific files
Dir.glob("*#{old_part}*.txt").each do |renaming|
  full_new_name = renaming.sub(/\A(.*)#{old_part}(.*)\z/, "\\1#{new_name}\\2")
  File.rename(renaming, full_new_name) 
end

What you were missing was to properly build the new name of file, changing old_name to new_name.