Comparing two Objects not working?

Question

I'm facing an issue with comparing two Objects.

I'm comparing an incoming Object, with an Object Array, to see if the Object is already in the array.

I tried two methods:

(betTemps is the Array of Objects, tempBet is the current object which should be compared.)

var duplicate = false;
for (let bet of this.betTemps) {
console.log(tempBet);
  console.log(bet);
  if(bet === tempBet) {
    console.log("reached");
    duplicate = true;
    break;
  }
}

The if afterwards:

.. else if(duplicate){
  alert("The Bet is already in the List");
} ...

Console Output after adding an Object which is already in the Array:

Console Output Screenshot

As you can see, they are equal, still the other Object is added to the array.

I tried using this method too with indexOf:

if(this.betTemps.indexOf(tempBet) > -1){
  alert("The Bet is already in the List");
}

Console Output after adding an Object which is already in the Array:

Console Output Screenshot

PS:

The code before the comparison:

  addBet(bet, index){
var tempBet = Object.assign({}, bet);
var select = (document.getElementById('select'+index)) as HTMLSelectElement;
select = select.options as HTMLSelectElement;
let count = 0;

tempBet.category = [];
for(let i = 0; i < 3; i++) {
    if (select[i].selected) {
      tempBet.category.push(select[i].value):
      count++;
    }
}

The code after the comparison:

if (count == 0) {
  alert("There has to be at least one Category choosen!");
} else if(duplicate     <- This part changes individually which method you use ->){
  alert("The Bet is already in the List");
} else {
  this.betTemps.push(tempBet);
}

score 1 · Answer 1 · answered Mar 29 '18 at 12:42

1

The best way to check if an object is in an array is using the array includes function: Like if I want to check if A object is in B array I would check (A === B.includes(A))

answered Mar 29 '18 at 12:42

user9069254

153
2
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Comparing two Objects not working?

1 Answers1