Front-end and full-stack developers use JavaScript arrays every day. Most of them, however, haven’t done a deep dive to understand how JS arrays are implemented in native code. Not doing this doesn’t mean you’re a bad developer. It’s entirely possible to use JavaScript effectively without digging in to understand how JS arrays are implemented. But…
Advice for Freelance Web Developers
This post is based on a reply I wrote on /r/webdev. Someone decided it was worth giving Reddit gold to, so I figure it’s worth posting here and expanding on it a bit. Just to be clear, I’m not currently working as a freelance web dev, although I’ve done it in the past. My advice…
JavaScript indexOf vs includes performance
This is a short response I wrote to a question on /r/javascript. The user who asked it was curious whether there would be any performance difference between using indexOf or includes when trying to find a substring within a larger string. Let’s take a look at the ECMAScript specification to see what it says. In the case of indexOf vs includes, you’ll…
JavaScript Array.prototype.push performance
This is a short response I wrote to a question on /r/javascript. The user who asked it was curious whether there would be any performance difference between adding elements to a JavaScript array by calling push, or manually adding a new object to an array by making a call like myArray[myArray.length] = obj. Let’s take a…