Flutter and Flutter Web are generating plenty of buzz, and deservedly so; they are pushing the boundaries of UI development. Flutter is written in Dart, and Dart has just gained a number of features under the banner “UI as Code” that will bring joy to every Flutter developer’s day. …

Rejoice, all ye faithful, for Dart 2.0 is coming, and it has types. This is Dart’s first major breaking change — hence the “2” — and it’s precisely because it’s a breaking change that it’s such an important development. Let’s dig into why that is. First, some Dart 1 code: …

Dart’s built_value provides powerful, convenient immutable values for Dart. The values might be immutable, but the package hasn’t been standing still! In the six months since I last wrote about built_value there have been ten major improvements to the package. I also spotted some interesting uses of built_value in the…

I heard some are moving from JavaScript to Dart. Well, my journey was a bit different: I moved from Java to Dart. And, part of adwords.google.com came with me. AdWords is at the heart of Google’s revenue stream and is currently being rewritten in Dart. But the corner of AdWords…

Building good end to end tests is hard. Having good end to end tests is wonderful. How do you get from the former to the latter? Last week I introduced a simple chat server and client written in Dart. Half way through writing that code I decided to stop and…

Having thoroughly covered the basics of the “built” packages I’m now ready to up the ante by showing them in action. I wrote this code in a day and a half to use as an example in my talk at the Dart summit (video). It was designed to show off…

Last week I introduced built_value for immutable object models. We saw how to define object models in built_value; they’re immutable, easy to work with, and, if you like that sort of thing, a lot of fun. This article covers the rest of the built_value package. The biggest item is that…

Last week I wrote about built_collection. I finished by remarking that to really make use of immutable collections, you need immutable values. So here we are: built_value. This is the second major piece behind my talk at Dart Developer Summit (video). Value Types The built_value package is for defining your own value…

A month ago I spoke at the Dart Developer Summit about object models with source_gen (video). I mentioned some packages and techniques that are highly deserving of a closer look, so here I am to tell the full story. First up: built_collection. The built_collection package provides SDK-like collections with immutability…