How to use constants as Object keys

At [22:24](https://youtu.be/rI_y2GAlQFM?t=1365) in the video Dan tries to use his constants as the keys in the object but it doesn't work for him. This is because he did it wrong.

when he did it you ended up with an object that had the strings "UP", "DOWN", etc as the keys but you wanted it to be the numbers that those constants represented. The way that you do that is to put the variables in square brackets. For example.
```ts
const UP = 0;
const DOWN = 1;
const LEFT = 2;
const RIGHT = 3;

const object1 = {
UP: [],
DOWN: [],
LEFT: [],
RIGHT: []
}

const object2 = {
[UP]: [],
[DOWN]: [],
[LEFT]: [],
[RIGHT]: []
}

console.log(object1) => // {UP: Array(0), DOWN: Array(0), LEFT: Array(0), RIGHT: Array(0)}
console.log(object2) => // {0: Array(0), 1: Array(0), 2: Array(0), 3: Array(0)}
}
```
and here's an interactive example https://editor.p5js.org/D_Snyder/sketches/r7rHl0QuA

The term for this is Computed Property Names and more details can be found here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Object_initializer#computed_property_names

Revisa el segmento de vídeo referenciado, el ejemplo de p5.js proporcionado y la referencia de MDN sobre computed property names. Actualiza la guía relevante del proyecto para explicar que los corchetes utilizan los valores numéricos de las constantes como claves de objeto y, después, verifica que el ejemplo corregido coincide con la salida mostrada.

Escrito por el modelo de indexación a partir del texto del issue.