In this tutorial, we are going to build a to-do app that can continue to work when the user loses their internet connection. The use cases for this type of functionality are countless, so it’s a good trick to have in your arsenal. The number one thing to know when…

Bitwise operations, while uncommon in Javascript, can come in handy in a variety of scenarios. Before I lose you, here’s a quick example for a common scenario: const isOdd(num) { return !!(num & 1); } Yup! Rather than using modulus, you can use the bitwise AND operator to determine if…

Hey guys, in this walkthrough I’ll be showing you everything you need to know to use React’s useEffect function like a pro. A brief history Before there was useEffect, there were lifecycle methods, namely: componentDidMount componentDidUpdate componentWillUnmount There are a couple others, but these are the main ones. componentDidMount is triggered immediately after…

The dynamic-programming method is a great approach to optimize an algorithm. In this tutorial we’ll review how to think through it and try some examples using Javascript. What are the benefits? If you have a (tentative) solution that has overlapping subproblems and exhibits optimal substructure, it may be possible to reduce the time complexity…

Hey all, if you’ve gone through the previous tutorial on Getting started with React+WebAssembly or are already familiar with the basics of React/WebAssembly and want to learn how to compile a real-world C library into WebAssembly and use it in the browser, then this is the tutorial for you! High-level strategy Our…

Hey all, Alex here. In part 1 of this WebAssembly mini-series, I’m going to guide you through getting a basic React+WebAssembly app going. Articles I found on the topic were either outdated or required the user to eject the Create-React-App (CRA) in order to modify the webpack config. …

Hey guys, Alex here. Thought I’d share how I went about building a file conversion API. In this example we’ll convert a webm file to mp3. With this approach, you should be able to convert any video or audio file you want provided it’s listed here: https://ffmpeg.org/ffmpeg-formats.html Let’s look at…

You just bought an awesome plot of land somewhere exotic and you have enough oranges to start a business. Being the tech-savvy person you are, you want to sell your oranges online. You consider setting up a database to manage your business, but you soon realize if you need a…

I wanted to share with you all a working example. When I was first following the tutorials at stellar.org, I noticed I had to do a lot of piecing together of the different bits of documentation. …