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JavaScript Object-Oriented JavaScript: Challenge Adding the Game Logic get owner() Solution

Posted by raul montes
raul montes
134 Points

how is the owner property linked to this.token if owner isn't a class?

Hello, I don't understand how is linked the owner property in the owner getter. There is no owner class like to create a const owner = new Owner() or a const token = new Token(); like to call the owner attribute in Space.js;

get owner(){
  if(this.token === null){
    return null;
  }else{
    return this.token.owner;
  }
}

this.token was declared in the class Space, but owner is not part of this class, neither was created in the Space class.

I don't see the connection between both.

Thanks

Andrii Kodola
seal-mask
.a{fill-rule:evenodd;}techdegree
Andrii Kodola
Full Stack JavaScript Techdegree Student 16,870 Points
Andrii Kodola
.a{fill-rule:evenodd;}techdegree
Andrii Kodola
Full Stack JavaScript Techdegree Student 16,870 Points

Hi.

When Space first created it will have its property Space.token set to null. But then you can change this property by passing Token object to it. And token object has property Token.owner. So you won't try to access space.owner property or getter, but token.owner property.

In other words, this.token.owner means this.token = token placed inside this space, and this.token.owner = owner of the token placed inside this space.

Hope it will be useful.

2 Answers

Ross King
Ross King
22,165 Points
Ross King
Ross King
22,165 Points

Once a Token object is assigned to a Space, you can then reference that Token by calling this.token, which will give you access to all of its properties (e.g., owner, id, dropped, columnLocation).

When you call this.token.owner, 'this' is referring to the Space object you have created, and the .token.owner part is directly referring to the Token object that has been placed inside of the Space's token property (this.token).

this.token + token.owner = this.token.owner

Does that help? :)

David Aguirre
David Aguirre
8,170 Points
David Aguirre
David Aguirre
8,170 Points

Well guys I thought I was trying to understand with the response above but I just wanted to confirm if the this.token.owner / / .owner has nothing related with the this.owner property inside the Token Class

Can somebody confirm this?

Thanks