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I have written quite a lot about how to follow SOLID principles, but one thing that can be useful is examples of where a principle is not being followed. What does your code look like when it wants to tell you something? Here are the signs that you broke the Interface Segregation Principle (ISP). Here […]
As the JavaScript and TypeScript communities move towards module loading in greater numbers, the topic of bundling came up in conversation. Bundling has that deceptive sparkling aura of “best practice” around it that means people can think you should just use bundling as a default practice. I am hoping to disrupt this thinking, particularly for […]
We’ve all read JavaScript: The Good Parts, and there is plenty of wisdom in Douglas Crockford’s landmark work. His reminder that eval is evil has echoed through the JavaScript community and saved many people from a total mess. However, as programmers we must remain thinking individuals who question received wisdom. You must resist inappropriate use […]
Five years ago today (1st October 2012), Microsoft publicly announced the TypeScript programming language. I was overjoyed, as I had been looking at Coffescript and Dart, but TypeScript looked different. “…TypeScript reviews appeared positive, with developer Steve Fenton calling it a ‘great new take on the JavaScript problem’, and ‘the first that doesn’t assume that […]
This is the shortest note possible to warn you about the “TypeScript vs Babel”, “TypeScript vs JavaScript”, “TypeScript vs… pretty much everything in the world” articles out there. There are multiple problems in the articles I am reading in my feeds. Superficial The main problem is that the people comparing TypeScript with all the languages […]
Rather sadly, the FirefoxOS project got binned, which removed the momentum of the device sensor APIs that Mozilla was the big sponsor of. What this means for these APIs is that, while many are actually well through the standardisation process, the browser support is sketchy. Your motion and orientation sensor will show you very low […]
I had a feeling I would be writing this article when I first penned TypeScript Mixins Part One back in 2014. For simplicity, I have used exactly the same program in this updated example, so you should find it easier to compare the simple mixins from the olden times, with the real mixins in this […]
There are lots of ways to make an identity immutable and unconfusable. I’ll show just a couple, but first the principle behind it. Your identity should be immutable, because you will accumulate lots of threads back to your item that need that identity. If the identity changes, you will be breaking all of the relationships […]
A long time ago I wrote that you should Stop Mixing TypeScript Internal and External Modules. Well it is time to update my information on this point… because they are now called namespaces, and modules. So my update is simply this: Stop Mixing TypeSCript Modules and Namespaces Let’s back this up with a bit more […]
Firstly, when you need a type definition for a JavaScript library that you want full type information for, there is Definitely Typed. But before you grab a type definition, let’s stop and think for a minute. TypeScript does indeed bring you lots of benefits in terms of type checking, and editor features such as auto-completion […]