How to Swap Array Elements in JavaScript: A Simplified Approach

In JavaScript, exchanging elements within an array often requires the following cumbersome process:

var a = list[x], b = list[y]; // Store the values
list[y] = a; // Swap the values
list[x] = b;

A More Efficient Solution:

A simpler method utilizes only one temporary variable:

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

ES6 Destructuring Assignment:

For JavaScript versions ES6 and later, the process can be further streamlined with destructuring assignment:

[arr[0], arr[1]] = [arr[1], arr[0]]; // Swap values

This line, for example, would swap the first two elements of the array arr = [1,2,3,4] to produce [2,1,3,4].