Train

o1.train.Train

See theTrain companion object

class Train(val description: String)

The class Train represents trains which consist of a number of passenger cars. The cars are numbered from one upwards (starting from the head of the train).

A train object is mutable. New cars can be added to it with the addCar method, but initially a train has no cars. Trains have a maximum length (in cars) which they must not exceed.

A train may contain cars of various types, that is, instances of any class that extends TrainCar.

Parameters

description: a description of the train, e.g. "From Helsinki to Oulu, leaves at 8:13"

Attributes

Companion: object
Graph
Supertypes: class Object

trait Matchable

class Any

Members list

Value members

Concrete methods

Adds the given car to the end of the train, if possible.

Parameters

car: the car to be added

Attributes

Returns: true if the car was added, false if the length would have become excessive
See also: Train.MaximumLength

Returns the car indicated by the given number, wrapped in an Option. Returns None if the given number is too low or too high.

Parameters

numberOfCar: the number of the car that should be returned (must be between 1 and the number of cars in the train or the result will be None)

Attributes

Returns the number of (passenger) cars there are in this train.

Attributes

Concrete fields

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This document is part of the ebook for O1 (aka CS-A1110 Programming 1), a course at Aalto University.