# A nested class representing an address
class Address
attr_accessor :city, :zip
def initialize(city, zip)
@city = city
@zip = zip
end
end
# A class representing a person, containing a nested Address
class Person
attr_accessor :name, :age, :address
def initialize(name, age, address)
@name = name
@age = age
@address = address
end
end
# Helper function to print the list
def print_persons(people)
people.each do |p|
puts "#{p.name} | age: #{p.age} | city: #{p.address.city} | zip: #{p.address.zip}"
end
end
# Sort persons by city, then zip, then age
def sort_persons(people)
people.sort_by! { |p| [p.address.city, p.address.zip, p.age] }
end
# Sample data
people = [
Person.new("Alice", 30, Address.new("San Francisco", 42100)),
Person.new("Bob", 40, Address.new("Austin", 32000)),
Person.new("Carol", 35, Address.new("New York City", 42000)),
Person.new("Dave", 25, Address.new("Austin", 32000)),
Person.new("Eve", 28, Address.new("New York City", 61000))
]
# Perform sorting
sort_persons(people)
# Display sorted results
print_persons(people)
=begin
run:
Dave | age: 25 | city: Austin | zip: 32000
Bob | age: 40 | city: Austin | zip: 32000
Carol | age: 35 | city: New York City | zip: 42000
Eve | age: 28 | city: New York City | zip: 61000
Alice | age: 30 | city: San Francisco | zip: 42100
=end
