Arrays of Consecutive Elements in JavaScript

Introduction

In this lab, we will explore how to find all arrays of consecutive elements in a given array using JavaScript. We will learn how to use Array.prototype.slice() and Array.prototype.map() methods to extract and map elements of an array to create arrays of n consecutive elements. This lab will help you improve your understanding of JavaScript array manipulation and functional programming concepts.

Skills Graph

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Finding Arrays of Consecutive Elements

To find arrays of consecutive elements, follow these steps:

Open the Terminal/SSH and type node to start practicing coding.
Use Array.prototype.slice() to create an array with n - 1 elements removed from the start.
Use Array.prototype.map() and Array.prototype.slice() to map each element to an array of n consecutive elements.

Here's an example function that implements these steps:

const findConsecutive = (arr, n) =>
  arr.slice(n - 1).map((v, i) => arr.slice(i, i + n));

You can call this function with an array and a number n to find all arrays of n consecutive elements in the array. For example:

findConsecutive([1, 2, 3, 4, 5], 2);
// [[1, 2], [2, 3], [3, 4], [4, 5]]

Summary

Congratulations! You have completed the Arrays of Consecutive Elements lab. You can practice more labs in LabEx to improve your skills.