Array Similarity Algorithm Exploration

Introduction

In this lab, we will explore the Array Similarity algorithm, which is used to find common elements between two arrays. Through this lab, you will learn how to use built-in JavaScript methods like Array.prototype.includes() and Array.prototype.filter() to compare arrays and extract their common elements. This algorithm is a useful tool for developers when working with large datasets and analyzing data.

Skills Graph

How to Find Array Similarity in JavaScript

To practice coding, open the Terminal/SSH and type node. This will help you understand how to find an array of elements that appear in both arrays. Follow these steps:

1. Use the Array.prototype.includes() method to determine the values that are not a part of values.
2. Use the Array.prototype.filter() method to remove them.

Here's the code to find the array similarity:

const similarity = (arr, values) => arr.filter((v) => values.includes(v));

You can test this code by running the following command:

similarity([1, 2, 3], [1, 2, 4]); // [1, 2]

This will return [1, 2] as the output.

Summary

Congratulations! You have completed the Array Similarity lab. You can practice more labs in LabEx to improve your skills.