Does JavaScript have tuples?

Question

I would love to know if there are python type tuples in JavaScript. I am working on a project and I need to just use a list of objects rather tan an array.

Answer 1

Javascript does not support a tuple data type, but arrays can be used like tuples, with the help of array destructuring. With it, the array can be used to return multiple values from a function. Do

function fun()
{
    var x, y, z;
    # Some code
    return [x, y, z];
}

The function can be consumed as

[x, y, z] = fun();

But, it must be kept in mind that the returned value is order-dependent. So, if any value has to be ignored, then it must be destructured with empty variables as

[, , x, , y] = fun();

Answer 2

The closest to a tuple is using Object.seal() on an array which is initiated with the wanted length:

let arr = new Array(1, 0, 0);
let tuple Object.seal(arr)

Otherwise, you can use a Proxy:

let arr = [ 1, 0, 0 ];
let tuple = new Proxy(tuple, {
    set(obj, prop, value) {
        if (prop > 2) {
            throw new RangeError('this tuple has a fixed length of three');
        }   
    }
});

Update: There is an ECMAScript proposal for a native implementation of a Tuple type