# Solved: ts reverse array

Reversing an array in Typescript involves essentially changing the order of the elements inside an array from the extant sequence to the opposite. This process is a crucial facet in the manipulation of arrays, and hence, can be extremely helpful in solving a variety of complex problems.

The Typescript language encompasses a built-in method to reverse arrays, known as the array.reverse() function. Indeed, using this function, we can effortlessly reverse any array in Typescript.

To illustrate its usage, consider the following sample array:

`let array = [1, 2, 3, 4, 5];`

We can then reverse this array by using the array.reverse() function as follows:

`array = array.reverse();`

This operation will reverse the order of the elements in the original array so that its sequence becomes the opposite of what it was before the function was applied.

## Understanding the array.reverse() function

The array.reverse() function in Typescript works by swapping the position of the elements in a given array. It starts by switching the first element with the last, the second element with the second last, and so on, until it achieves the complete reversal of the array.

To get a clearer picture, let’s break down an example.

Consider the initial array [1,2,3,4,5]. When the aforementioned function is applied, the function first swaps 1 with 5, making the array [5,2,3,4,1], it then swaps 2 with 4, resulting in the array [5,4,3,2,1]. At this point, we reach the middle of the array and the reversal is complete and our final reversed array becomes [5, 4, 3, 2, 1].

## Exploring Typescript Libraries

Beyond the built-in methods, there exist various libraries which provide a wide array of tools and functions to tackle many kinds of problems in Typescript. For instance, libraries such as Lodash or Underscore provide a multitude of functions that ease array and object manipulations.

So remember, having a savvy understanding of array manipulations and built-in functions can prove greatly beneficial while designing algorithms and addressing diverse challenges in Typescript.

## Relevance of Built-In Functions in Typescript

Typescript’s built-in functions are fundamental to creating concise, clean, and efficient code. They provide pre-written code snippets to solve common problems, thereby reducing your work time, risk of errors, and ultimately enhancing your code’s performance.

Utilizing these built-in functions, or methods, in the correct and efficient manner requires a comprehensive understanding of their workings and implementations; this can open new avenues for code optimization, making your code more clean, efficient, and scalable.

Remember – every programming language, including Typescript, is just a tool. To make the best use of it, it’s important to understand not only its syntax, but also its library functions, their strengths, and their weaknesses.

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