Occasional musings on software development, tech, the Middle East, and anything else.
A missing trackBy in an ngFor block or a data table can often result in hard-to-track and seemingly glitchy behaviors in your web app. Today, I'll discuss the signs that you need to use trackBy . But first—some context: More often than not, you'll want to render some repeated element in Angular. You'll see code that looks like this: In cases where the ngFor is looping over the results of a…
How helping on a film set led to me down a serendipitous path, publishing a new open source library, and getting an IMDB mention. About a year ago, a friend asked me—along with some others—to help as extra hands on set filming the second season of an absurdist comedy mini-series she was working on called Look it Up . Helping film anything wasn't something I thought I would ever do, so I was…
Sometimes, the best way to learn a new concept is to try to implement it. With my journey with reactive programming, my attempts at implementing Observables were key to to my ability to intuit how to best use them. In this post, we'll be trying various strategies of implementing an Observable and see if we can make get to working solution. I'll be using TypeScript and working to implement…
In our quest to model Schema.org classes in TypeScript, we've so far managed to model the type hierarchy , scalar DataType values , and enums . The big piece that remains, however, is representing what's actually inside of the class: it's properties. After all, what it means for a JSON-LD literal to have "@type" equal to "Person" is that certain properties — e.g. "birthPlace" or…
Schema.org has a concept of a DataType , things like Text , Number , Date , etc. In JSON-LD, we represent these as strings or numbers, rather than array or object literals. This data could describe the name of a Person , a check-in date and time for a LodgingReservation , a URL of a Corporation , publication date of an Article , etc. As we'll see, the Schema.org DataType hierarchy is far…
