PStore is a core Ruby library.
It stores Ruby objects and data structures in a file.
You can reload the objects back into memory from the disk file.
This technique is known as object persistence.
require 'pstore' class Person # www . j a v a 2 s. com attr_accessor :name, :job, :gender, :age end fred = Person.new fred.name = "Java" fred.age = 45 laura = Person.new laura.name = "Json" laura.age = 23 store = PStore.new("storagefile") store.transaction do store[:people] ||= Array.new store[:people] << fred store[:people] << laura end
Here, you create a new PStore in a file called storagefile.
You can retrieve the data from the PStore database:
require 'pstore' class Person # from w ww . j a v a 2s .co m attr_accessor :name, :job, :gender, :age end fred = Person.new fred.name = "Java" fred.age = 45 laura = Person.new laura.name = "Json" laura.age = 23 store = PStore.new("storagefile") store.transaction do store[:people] ||= Array.new store[:people] << fred store[:people] << laura end store = PStore.new("storagefile") people = [] store.transaction do people = store[:people] end # At this point the Person objects inside people can be treated # as totally local objects. people.each do |person| puts person.name end