How to Swap Array Elements in JavaScript: Destructuring vs. Temporary Variables?

Swapping Array Elements with Ease in JavaScript

Often when working with arrays, the need arises to swap two elements within the array. A common approach to this is:

var a = list[x], b = list[y];
list[y] = a;
list[x] = b;

While this method works, it involves creating two temporary variables. Is there a simpler way to achieve the same result?

A Simpler Swap Using a Single Temporary Variable

Yes, you can swap two elements in an array using only one temporary variable:

var b = list[y];
list[y] = list[x];
list[x] = b;

Destructuring Assignment (ES6 and Later)

For JavaScript versions ES6 and later, a more concise and elegant solution exists: destructuring assignment. It allows you to swap values in an array in a single line, as shown below:

[arr[0], arr[1]] = [arr[1], arr[0]];

This technique produces the expected swapped result without the need for any temporary variables. It's a powerful feature that simplifies array manipulation tasks.

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