JavaScript Copy Array: How to make an exact copy of an array in JavaScript Video

In this tutorial, you’ll learn how the JavaScript copy array process works.

Don’t forget to subscribe to the Junior Developer Central channel for more videos and tutorials!

You’ll learn about two ways that JavaScript can be used to copy an array. First, we’ll take a look at the slice function which is a built-in JavaScript function that can be called on an array.

The slice function actually returns back a portion of an array based on the value you supply it as an argument. Typically you would use this to miss the first character from a string (like when using JavaScript to capitalize the first letter of a string). However, in this example, you’ll see that not provided the slice function with a value just returns a complete copy of the entire array and there you have a copy of your original array.

The second method you’ll learn about is the ES6 spread operator which is usually used to insert the values of an entire array into another one. You’ll see in the video that inserting the values into a blank array allows you to create an exact copy.

So JavaScript variables that aren’t primitive data types are copied by reference when you just assign variableA to variableB. It therefore makes sense that a JavaScript array is copied by reference too. In the final section of the video, you’ll see why you can’t just copy a JavaScript array by assigning the variable name to another variable.

Other videos in the JavaScript Snippets series:

JavaScript How To Remove An Item From Array Tutorial: https://youtu.be/UvohHcj9I-s
Javascript String Length: How to determine the size of a string: https://youtu.be/OO0_9gq8NNI
How to find the longest word in a String with JavaScript: https://youtu.be/j9cAav7VIv4
Find the largest number in an array JavaScript Tutorial: https://youtu.be/fOFSmCjvcFY
Check if a String is a palindrome with JavaScript Tutorial: https://youtu.be/_KE_yCKBqUA
How to reverse a String in JavaScript Tutorial: https://youtu.be/k7zzWvQaEhc
JavaScript join method: How to merge arrays into one value: https://youtu.be/90MVWda5DlM
Javascript How To Convert String To Number Tutorial: https://youtu.be/K-Twvsg3K_M
JavaScript Create HTML Element: How to dynamically add tags to your pages: https://youtu.be/VsXCK_2DJzA
JavaScript String Contains: How to check a string exists in another: https://youtu.be/uLT9iPccVZs
Link JavaScript to HTML: How to run your JavaScript code in the browser: https://youtu.be/821C5aJ3SLM
JavaScript Capitalize First Letter: How to make strings and arrays sentence case: https://youtu.be/8IEI-7fj2j4
Javascript Print To Console Tutorial: Different ways to output data to the console: https://youtu.be/pkFbigsR7jI Channel Handle @codebubb

About the Site 🌐

This site provides links to random videos hosted at YouTube, with the emphasis on random. 🎥

Origins of the Idea 🌱

The original idea for this site stemmed from the need to benchmark the popularity of a video against the general population of YouTube videos. 🧠

Challenges Faced 🤔

Obtaining a large sample of videos was crucial for accurate ranking, but YouTube lacks a direct method to gather random video IDs.

Even searching for random strings on YouTube doesn't yield truly random results, complicating the process further. 🔍

Creating Truly Random Links 🛠️

The YouTube API offers additional functions enabling the discovery of more random videos. Through inventive techniques and a touch of space-time manipulation, we've achieved a process yielding nearly 100% random links to YouTube videos.

About YouTube 📺

YouTube, an American video-sharing website based in San Bruno, California, offers a diverse range of user-generated and corporate media content. 🌟

Content and Users 🎵

Users can upload, view, rate, share, and comment on videos, with content spanning video clips, music videos, live streams, and more.

While most content is uploaded by individuals, media corporations like CBS and the BBC also contribute. Unregistered users can watch videos, while registered users enjoy additional privileges such as uploading unlimited videos and adding comments.

Monetization and Impact 🤑

YouTube and creators earn revenue through Google AdSense, with most videos free to view. Premium channels and subscription services like YouTube Music and YouTube Premium offer ad-free streaming.

As of February 2017, over 400 hours of content were uploaded to YouTube every minute, with the site ranking as the second-most popular globally. By May 2019, this figure exceeded 500 hours per minute. 📈

List of ours generators⚡

Random YouTube Videos Generator

Random Film and Animation Video Generator

Random Autos and Vehicles Video Generator

Random Music Video Generator

Random Pets and Animals Video Generator

Random Sports Video Generator

Random Travel and Events Video Generator

Random Gaming Video Generator

Random People and Blogs Video Generator

Random Comedy Video Generator

Random Entertainment Video Generator

Random News and Politics Video Generator

Random Howto and Style Video Generator

Random Education Video Generator

Random Science and Technology Video Generator

Random Nonprofits and Activism Video Generator