Configuration Files in Ruby

In Ruby, you can create configuration files using a YAML (YAML Ain’t Markup Language) file. Here’s an example of how to create and use a YAML config file in a Ruby application:

1. Create a YAML file with the configuration data, for example config.yml:

development:
  host: localhost
  port: 3000

production:
  host: example.com
  port: 80

2. Load the YAML file in your Ruby code:

require 'yaml'

config = YAML.load_file('config.yml')

# access the values in the config file
host = config[ENV['RAILS_ENV']]['host']
port = config[ENV['RAILS_ENV']]['port']

3. Use the values in your code:

puts "Host: #{host}"
puts "Port: #{port}"

Note that in this example, the environment (development or production) is determined by the RAILS_ENV environment variable. You can use other methods to set the environment if desired.