I saw this post on Reddit about a JavaScript coding assessment and it got me thinking about map() and forEach(). They look similar, but they do different jobs. Here’s how I think about it, and why I usually go with map() when I’m transforming data. What’s map()? The map() method...

One piece of JavaScript syntax I’ve come to appreciate is the nullish coalescing (??) operator. It’s easy to overlook until it saves you from a subtle bug. If you’re still using the logical OR (||) operator to provide default values, it’s worth knowing where the two behave differently. What each...

One habit I’ve picked up over the years is using unknown as a default before any. I still use any occasionally, but I’ve become much more intentional about it. The reason is pretty simple: any opts you out of TypeScript’s type checking. That can be convenient when you’re prototyping or...