Is it feasible to retrieve the name of an object from an array where it is stored?

Context: The data structure provided below makes it easy to access individual items and their properties. For instance, retrieving the value Volkswagon is a simple task.

let car = {};
let truck = {};

car.one = 'Volkswagon';
car.two = 'Toyota';

truck.one = 'Dakota';
truck.two = 'Tacoma';

let vehicleArray = [car, truck];

console.log(vehicleArray[0].one);  //Volkswagon

Inquiry: Is there a way to access the names of the objects stored in the array? Specifically, how can we retrieve the values car and truck from the array itself? I am unsure of how to achieve this without any guidance.

The snippet of code below only displays the properties and values within the object, but not the actual name of the object.

console.log(vehicleArray[0]); // { one: 'Volkswagon', two: 'Toyota' }

Answer №1

If you want to extract all the values from an array, you can use the map method in JavaScript like demonstrated below:

let cat = {};
let dog = {};

cat.one = 'Persian';
cat.two = 'Siamese';

dog.one = 'Bulldog';
dog.two = 'Labrador';

let petArray = [cat, dog];

petArray.map(({ one, two }) => console.log(one, two))

Alternatively, if you are looking for a specific value from the array, you can utilize the filter method as shown here:

let cat = {};
let dog = {};

cat.one = 'Persian';
cat.two = 'Siamese';

dog.one = 'Bulldog';
dog.two = 'Labrador';

let petArray = [cat, dog];

console.log(petArray.filter(item => item === dog)[0].one)

This approach involves comparing object equality using the equality comparison in JavaScript.

Answer №2

Is it possible to retrieve an object's name from an array where it is stored? Unfortunately, you cannot do so...

However, if you wrap your objects with names and then push them to the array, you will be able to get the names back.

let car = {};

let truck = {};

car.one = 'Volkswagon';

car.two = 'Toyota';

truck.one = 'Dakota';

truck.two = 'Tacoma';

vehicleArray = [{car}, {truck}];

vehicleArray.map(v => console.log(Object.keys(v)[0]));

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