CODEWITHSUNDEEP
oopcoffeescript
Craig Harley
Craig Harley

Reputation: 331

Coffeescript Object as a private member, is it possible?

I'm used to being able to in Java define an object which can contain other objects as members, for example (psuedocode): 

class Zoo{
private List<Animal> animals;
}
class Animal {
private double weight;
private double height;
private double species;
}

Then you could have a constructor for zoo which takes X animals and adds them to an animal collection and have it's own methods.

In coffeescript I can't seem to be able to do this, is this a limitation of javascript?

Upvotes: 2

Views: 44

Answers (1)

djaszczurowski
djaszczurowski

Reputation: 4533

hope I understood your question.

in Coffeescript you may write

class Animal
  name: ''

class Zoo
  animals: [] #notice you do not specify type!

  constructor: (animalList) ->
    @animals = animalList #and animal list is an array of Animal class instances


zoo = new Zoo([new Animal()])
console.log(zoo.animals.length) #should be eq to 1

If you want animals to be private same as it would be in Java or C#, I would recommend not using classes but:

Zoo = (animals) ->

  return {
    getAnimals: -> animals
    addToAnimals: (animal) -> animals.push(animal)
  }

Upvotes: 4

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