Feature flags are a great way to prevent stale branches by regularly shipping features in your code without officially enabling them. A feature flag let’s you turn code on and off, in the case of features, a feature flag means you can regularly merge branches and release them. While there are many different ways you can approach this, one of my favourite and most simple approaches is a features.json file in your application.
I love SQLite and I am using it in my Aurelia 2 book for the server aspect to provide users with a real server backed by a database. I am using the equally brilliant Better SQLite 3 library which allows you to work with SQLite 3 databases in a performant and easy way. This is how I did a prepared statement for my LIKE query which searched products by title in my database. The statement itself needs LIKE ? and then on the all method we provide the argument.
Recently whilst working on my Aurelia 2 book, for the example application where you checkout I needed to add in the ability to provide a card number and when it saves, the last 4 digits of the card number get saved. This is one of those things that as developers we won’t do too often, but it’s easy using substr to trim a text string to a certain length. let ccNumber = '4560265043620583'; let lastFourDigits = ccNumber.substr(-4); By providing -4 as the value to substr you’re telling it to take the last 4 characters from the string. The result from our example will be 0583. You can also provide non-negative numbers to go from the beginning as well.
Buy the Aurelia 2 book here. With the Aurelia 2 alpha coming very shortly, I have had plans for a while to write another Aurelia book, this time around on Aurelia 2. I learned a lot writing my first book and admittedly, made a few mistakes. The learning experience was invaluable. With my first book, it came at a time when the Aurelia documentation was subpar. The book served as more of a stand-in for the lack of detailed and concise documentation. With Aurelia 2, extensive documentation work has been undertaken to the point where a book telling you about every little thing makes no sense.
Aurelia Store is a powerful state management library for your Aurelia applications, but behind-the-scenes it merely wraps the powerful RxJS observable library. This means you can use a plethora of RxJS methods to change how Aurelia Store works. Problem: Aurelia Store will fire all state subscribers regardless of change Whenever your state changes, all listeners of the state object will be fired. While smaller applications won’t introduce any noticeable differences, as your application grows in size and complexity, depending on what you’re doing inside of those store subscribers you can run into some issues.
If you are trying to use any methods in the HiveJS client which require the use of a private key, you might have encountered one or both of these errors. In my case, I was using the memo encode method which takes a private key as the first argument, unfortunately, pass it the wrong key and you’ll get a non-helpful AssertionError about an expected version. You’re seeing the error because you’re providing the wrong key. If you get the error, “AssertionError: Expected version 128, instead got 38” it means you are trying to use a public key when you need to use a private key.
I really dislike the CSS-In-JS trend. Nothing against anyone who is a fan, but writing CSS inside of Javascript doesn’t feel natural and honestly, it’s just an unnecessary abstraction. I understand why it became a thing, but the problems CSS-In-JS promises to solve have already been solved thanks to CSS Modules and Shadow DOM. As usual, the front-end development community are focused on tooling and not on the end-user experience. Numerous benchmarks have proven CSS-In-JS can introduce performance issues into your application.
And the government wonders why people were sceptical of the CovidSafe rollout (besides the very real safety concerns). It seems the CovidSafe rollout is flawed, with the discovery that the iOS version doesn’t even work properly. Software developer Joshua Byrd recently posted his findings on Twitter and they’re pretty damning. Basically, the app will only ever work in the foreground with the screen on for iOS users. On a technical level as explained in further Tweets, the phone will not broadcast UUID’s unless it is open. Coincidentally, the same issue was reported with Singapore’s app which CovidSafe is based upon and seemingly, nobody learned their lesson from.
Remember Voat? The non-censored alternative to Reddit that saw an influx of users in 2015 after Reddit started cleaning up its house a bit and claims of censorship became a hot button issue that drove people away from Reddit. The site has now become an anti-vaxxer, conspiracy theorist platform that resembles an uncontrollable raging dumpster fire. Although to be fair, the site was always teetering on the edge even in the beginning.
The signs have been there for a while now. Elon Musk is the eccentric real-life version of Tony Stark, who some believe will save the world with his forward-thinking investments and ideas like making electric vehicles cool or making his own rockets. But, for all of Elon’s great and commendable achievements come some highly questionable decisions and remarks. Known for his non-corporate approach to communication, he has landed in hot water several times over the years.