Sometimes, we want to use map() on an array in reverse order with JavaScript.
In this article, we’ll look at how to use map() on an array in reverse order with JavaScript.
How to use map() on an array in reverse order with JavaScript?
To use map() on an array in reverse order with JavaScript, we can use the array reverse method.
For instance, we write
const reversed = myArray
.slice(0)
.reverse()
.map((a) => {
//...
});
to call myArray with slice to make a copy of the array.
Then we can reverse to reverse the copied array.
Next, we call map with a callback to map the reversed array’s values to the ones we want.
Conclusion
To use map() on an array in reverse order with JavaScript, we can use the array reverse method.
