I am not sure what this does in this instance
let token = new Token(i, this);

Question

Creates token objects for player
@param   {integer}   num - Number of token objects to be created
@return  {array}     tokens - an arary of new token objects
*/
createTokens(num) {
const tokens = [];
for (let i = 0; i < num; i++) {
    let token = new Token(i, this);
    tokens.push(token);
}
return tokens;
}
I am not sure what this references in this instance. Can someone help me out

Josef Janousek · Answer

Hello @Billy Jones (https://teamtreehouse.com/billyjones2)  basically you are creating a new instance of class Token by new keyword as you might know.
you can see in the Token constructor function you have two arguments (index,owner) and the Player js inside of createToken method you are initiating the class Token by passing this two  value from the for loop (i,this) 
here (I = jndex) & this refer to the owner. 
Below I have created a simple example for you you can just copy and paste those to the developer console so you can see .
class Token {
    constructor(index, owner) {
        this.owner = owner;
        this.id = token-${index} - ${owner.id};
    }
}
undefined
class Player {
    constructor() {
        this.name = "sayeed";
        this.tokens = this.createTokens(4);
    }
    createTokens(num) {
        const tokens = [];
        for (let i = 0; i < num; i++) {
            let token = new Token(i, this);
            tokens.push(token);
        }
        return tokens;
    }
}
const p = new Player();
console.log(p);

Welcome to the Treehouse Community

Looking to learn something new?

Billy Jones

Billy Jones

I am not sure what this does in this instance let token = new Token(i, this);

1 Answer

Josef Janousek

Josef Janousek