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| class Vehicle | |
| attr_reader :color, :wheels, :status | |
| def initialize(args) | |
| @wheels=4 | |
| @fuel_economy=[true, false] | |
| @color = args[:color] | |
| end | |
| def drive | |
| @status=:driving | |
| end | |
| def brake | |
| @status=:stopped | |
| end | |
| def needs_gas? | |
| return @fuel_economy.sample | |
| end | |
| end | |
| class Car<Vehicle | |
| def initialize(args) | |
| super | |
| @fuel_economy=[true, false, false] | |
| end | |
| end | |
| class Bus<Vehicle | |
| attr_reader :passengers | |
| def initialize(args) | |
| super | |
| @fuel_economy=[true, true, true, false] | |
| @wheels=args[:wheels] | |
| @num_seats=args[:num_seats] | |
| @fare=args[:fare] | |
| @passengers=[] | |
| end | |
| def drive | |
| return self.brake if stop_requested? | |
| super | |
| end | |
| def admit_passenger(passenger,money) | |
| @passengers << passenger if money > @fare | |
| end | |
| def stop_requested? | |
| return [true,false].sample | |
| end | |
| end | |
| class Motorbike<Vehicle | |
| attr_reader :speed | |
| def initialize(args) | |
| super | |
| @wheels=2 | |
| @fuel_economy=[true,false,false,false] | |
| end | |
| def drive | |
| super | |
| @speed=:fast | |
| end | |
| def weave_through_traffic | |
| @status= :driving_like_a_crazy_person | |
| end | |
| end | |
| car=Car.new( color: "blue") | |
| puts car.color=="blue" | |
| puts car.wheels==4 | |
| car.drive | |
| puts car.status==:driving | |
| car.brake | |
| puts car.status==:stopped | |
| bus=Bus.new(color: "red", wheels: 6, num_seats: 30, fare: 2) | |
| puts bus.color=="red" | |
| bus.admit_passenger("Jim Bob", 3) | |
| puts bus.passengers==["Jim Bob"] | |
| bus.drive | |
| puts bus.status==:driving || bus.status==:stopped | |
| motorcycle=Motorbike.new(color: "black") | |
| puts motorcycle.color=="black" | |
| motorcycle.weave_through_traffic | |
| puts motorcycle.status==:driving_like_a_crazy_person | |
| motorcycle.brake | |
| puts motorcycle.status==:stopped |
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