What is the array.reverse() method in TypeScript?

Overview

It is easy to reverse an array in TypeScript using the reverse() method. We can also do this in JavaScript. As a general rule, whatever we can do in JavaScript, we can also do in TypeScript, in addition to being able to do much more.

Syntax

array.reverse()
Reverse an array in TypeScript

Parameters

The reverse() method requires an array as a parameter, which we want to reverse.

Return value

This method returns an array with all its elements in a reversed order.

Code example

// create arrays in TypeScript
let names: string[] = ["Theodore", "James", "Peter", "Amaka"]
let numbers : Array<number>;
numbers = [12, 34, 5, 0.9]
let cars : Array<string> = ["Porsche", "Toyota", "Lexus"]
let randomValues : Array<string | number> = ["one",1, "two", 2, 56]
// reverse the arrays and print the results
console.log(names.reverse())
console.log(numbers.reverse())
console.log(cars.reverse())
console.log(randomValues.reverse())

Explanation

  • Lines 2–6: We create some arrays in TypeScript.
  • Lines 9–12: We apply the reverse() method to all the created arrays and display their results on the screen.

Free Resources