Forked from dbc-challenges/P5: OO Inheritance.rb
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December 19, 2015 05:29
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| class MotorVehicle | |
| def initialize(args) | |
| @color = args[:color] | |
| @wheels = args[:wheels] | |
| end | |
| def drive | |
| @status = :driving | |
| end | |
| def brake | |
| @status = :stopped | |
| end | |
| def needs_gas?(likelihood) | |
| likelihood.sample | |
| end | |
| end | |
| class Car < MotorVehicle | |
| @@WHEELS = 4 | |
| def initialize(args) | |
| args[:wheels] = @@WHEELS | |
| super(args) | |
| end | |
| def needs_gas? | |
| super([true,true,false]) | |
| end | |
| end | |
| class Bus < MotorVehicle | |
| attr_reader :passengers | |
| def initialize(args) | |
| super(args) | |
| @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 | |
| def needs_gas? #DUPE | |
| super([true,true,true,false]) | |
| end | |
| end | |
| class Motorbike < MotorVehicle | |
| @@WHEELS = 2 | |
| def initialize(args) | |
| args[:wheels] = @@WHEELS | |
| super(args) | |
| end | |
| def drive | |
| super() | |
| @speed = :fast | |
| end | |
| def needs_gas? #DUPE | |
| super([true,false,false,false]) | |
| end | |
| def weave_through_traffic | |
| @status = :driving_like_a_crazy_person | |
| end | |
| end | |
| #Test Script | |
| puts "BIKE" | |
| bike = Motorbike.new({:color => "blue"}) | |
| puts bike.drive | |
| puts bike.brake | |
| puts bike.needs_gas? | |
| puts bike.weave_through_traffic | |
| puts "\nBUS" | |
| bus = Bus.new({:color => "yellow", :wheels => 6, :num_seats => 24, :fare => 2.25}) | |
| puts bus.drive | |
| puts bus.brake | |
| puts bus.admit_passenger("Bob Dole", 500) | |
| puts bus.passengers | |
| puts bus.admit_passenger("Jack Handey", 1) | |
| puts bus.passengers | |
| puts "Stop requested? #{bus.stop_requested?}" | |
| puts "Needs gas? #{bus.needs_gas?}" | |
| puts "\nCAR" | |
| car = Car.new({:color => "red"}) | |
| puts car.drive | |
| puts car.brake | |
| puts "Car needs gas? #{car.needs_gas?}" |
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