Why is there an issue with the way I am defining this Javascript variable?

In my JavaScript file, milktruck.js, I have defined an object called TruckModel.

My goal is to create an array of TruckModel objects because in my multiplayer game, I cannot predict how many players will enter or exit at any given time.

The issue I am facing is that the model is not displaying when I use the teleportToThat function below.

I managed to display the model by only declaring one TruckModel() object in my index.html file and using the teleportToThat function.

Can you review my code and point out any potential errors?

Here is the non-working version:

var opponentTrucks = [];

for (var i = 0; i < markers.length; i++) {

      opponentTrucks[i] = new TruckModel();
      opponentTrucks[i].teleportToThat(lat, lng, heading);

}

Here is the working version (where I am aiming to have varying amounts of TruckModel objects):

Declared in index.html file:

var model;

Declared in JavaScript file:

model.teleportToThat(lat, lng, heading);

Here is the complete JavaScript file:

javascriptarraysvariablesobjectdeclaration

Answer №1

In order to easily locate objects by numeric index, it is recommended to use an array rather than a regular object:

var opponentTrucks = [];

Your current approach might work, but it's more efficient to use a proper array if you plan to treat it as such.

update — it seems there is still some confusion regarding the issue at hand. Specifically, this line:

opponentTrucks[i].teleportToThat( lat, lng, heading );

What is the intended purpose of this line? Where is it supposed to be called from? What exactly is the value of "i"? If this statement is outside of a loop, it may not function as expected. If you want the "teleportToThat()" function to be executed for each element in the array, it should be placed inside the "for" loop.

Answer №2

In case you are utilizing only numeric keys, opting for an array instead of an object is recommended:

let competitorCars = [];

for (let i = 0; i < markers.length; i++) {
     competitorCars.push(new CarModel());
}

Although your current implementation may still work, switching to an array could lead to improvements.

If any errors persist, feel free to mention them! :-)

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