How can I use array destructuring when there's no array? [duplicate]

Question

I'm stuck at this task. How can I use array destructuring to change the three statements below into 1 statement?

The main reason for my confusion is that a and b are already declared. And there is no array.

´´´

(function UseArrayDestructuring2() {
        let a = 1;
        let b = 2;
        
        // Use array destructuring to change the 3 statements below into 1 statement.
        // You should not need a temporary variable anymore.
        let tmp = a;
        a = b;
        b = tmp; 

        // Don't make changes below this line   
        
        expect(a).toEqual(2);
        expect(b).toEqual(1);

´´´

Does this answer your question? How to swap two variables in JavaScript (This answer specifically.) — Ivar
– Ivar, Commented Feb 16, 2021 at 8:22

Nina Scholz · Accepted Answer · 2021-02-16 09:41:25Z

4

You could collect the values in an array and destructure the array to the swiched variables.

This approach creates still a temporary value.

[b, a] = [a, b];

edited Feb 16, 2021 at 9:41

answered Feb 16, 2021 at 8:20

Nina Scholz

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1 Comment

jonrsharpe Over a year ago

It creates a temporary value, the array, but no additional variables.

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