YAML::Store provides the same functionality as PStore, except it uses YAML to dump objects instead of Marshal.

Example

require 'yaml/store'

Person = Struct.new :first_name, :last_name

people = [Person.new("Bob", "Smith"), Person.new("Mary", "Johnson")]

store = YAML::Store.new "test.store"

store.transaction do
  store["people"] = people
  store["greeting"] = { "hello" => "world" }
end

After running the above code, the contents of “test.store” will be:

---
people:
- !ruby/struct:Person
  first_name: Bob
  last_name: Smith
- !ruby/struct:Person
  first_name: Mary
  last_name: Johnson
greeting:
  hello: world
Methods
N
Class Public methods
initialize( file_name, yaml_opts = {} )

Creates a new YAML::Store object, which will store data in file_name. If the file does not already exist, it will be created.

Options passed in through yaml_opts will be used when converting the store to YAML via Object#to_yaml.

Source: show | on GitHub 

# File lib/yaml/store.rb, line 49
def initialize file_name, yaml_opts = {}
  @opt = yaml_opts
  super
end