更改类变量的值

Question

I'll apologise in advance, if this is something straightforward. I'm at a bit of a loss as to what technical terms I need to actually search for the documentation on this. It's fairly straight forward stuff. I have a class, an instance of that class and a function I want to run, that would change one of the values established in the class constructor. Below you'll find an example that's effectively, exactly what I'm aiming for.

class CLASS {
  constructor(name) {
    this._name = name;
    this._round = 0;
    this._wins = 0;
    this._losses = 0;
  }

  get name(){
    return this._name;
  } 

  ...

}

const PL1 = new CLASS('Player 1');

...

function updatePL(player, pointsFor, pointsAgainst) {
  if (pointsFor > pointsAgainst) {
    return player.wins++ } else if ...
  ...

}



console.log(PL1); // Prebiously "console.log(player)" Edited. Not source of issue in actual code.  

updatePL(PL1, 1, 0);

console.log(PL1); //No changes

I've tried various means of adding and subtracting, both inside and outside the function. I'm stumped. Moreover, I was performing fairly similar similar steps inside something like this with no issues:

object = [{
  a: 1,
  b: 2,
  },
  {
    ...
  }];

Again, the technical terms elude me so I don't known what to look for. Any information, even if it's just pointing me in the vague direction of a google search term, would be fabulous. Thank you.

Answer 1

You might want to console.log(PL1) instead of console.log(player) , cuz player is local to your updatePL function. Also you used _wins in the class but wins in updatePL so make sure you're using the same.

In between though, why declare PL1 as constant when you're mutating it ? Also you don't need to return player.wins from updatePL , you can alway access this prop from the object itself like so PL1.wins. or PL1.your_getter