Using each for object with an array of objects

Question

I have an object

@cars = Cars

that has an array

car_array

of objects

Car

that have instance variables

@id

and

@mileage

, so, writing it as pseudo array it's:

Cars = [

    Car1 = [1, 12000],

    Car2 = [2, 33000]

]

Is there a way to write an

each

method to iterate over the cars, in this way:

@cars.each do |id, mileage|

    ...

end

?

I've tried to do a custom

each

method in

Cars

:

def each(&block)

    @car_array.each(&block)

end

but that would only return each

Car

object into the enumerator. How would I then convert each

Car

object to an array?

Answer 1

In ruby we do chain methods to accomplish different complicated transforms:

@cars.map do |car|
  [car.id, car.mileage]
end.each do |id, mileage|
    ...
end

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