Ruby - How to write a new file with output from script

Question

I have a simple script that does some search and replace. This is basically it:

File.open(\"us_cities.yml\", \"r+\") do |file|
  while line = file.gets
  \"do f         


        

Answer 1

First you have to create a new file such as newfile.txt

Then change the script to

File.open("us_cities.yml", "r+") do |file|
  new_file = File.new("newfile.txt", "r+")
  while line = file.gets
  new_file.puts "do find a replace"
  end
end

This will make a new file with the output