Skip to main content

New Dart Editor Release Brings map() Back


Dart Editor has a new build and several of the recent breaking changes have been incorporated (including the popularly requested switch from mappedBy() to map()). Eric Clayberg fills us in on the details:
A new Dart Editor build is available at www.dartlang.org/editorChanges include:
  • Auto completion for imports (dart:, package: and relative).
  • Cleanups for:
    • Date -> DateTime,
    • new Date.fromString -> DateTime.parse,
    • and new Uri.fromString -> Uri.parse
  • Several and various changes to the context menu and the Navigate top-level menu.
  • The standalone VM can now be used to generate snapshots:
    • dart --generate-script-snapshot=foo.dart.snapshot foo.dart, and
    • dart --use-script-snapshot=foo.dart.snapshot foo.dart
  • Fixed an issue with changing perspectives in the plugins distribution.
  • Files in packages directories are now opened read-only.
  • Bug fixes and UX cleanup.
Breaking Change List:
  • Deprecated Element.elements has been removed- it is now Element.children.
  • Deprecated Element.innerHTML has been removed- it is now Element.innerHtml.
  • Removed Sink interface and moved CollectionSink to dart:async.
  • dart2js has a new option to control which libraries are available. By default, the compiler selects the “Client” category for browser development. However, if you’re using dart2js to generate minified Dart code for a server application, you need to use the option “--categories=Server”. This change happened in 0.3.2.0, but we failed to recognize it would impact the dart->dart use case and didn’t document this earlier.
  • Date has been renamed to DateTime.
  • new DateTime.fromString(str) (constructor) has been renamed to DateTime.parse(str) (static method).
  • Iterable.mappedBy -> Iterable.map
  • List.{mappedBy|skip|take} returns an Iterable (and not a List).
  • Stream.mappedBy -> Stream.map
  • Removed List.filled constructor.
  • Deprecated Strings.join() and Strings.concatAll().
  • Strings class is going away
  • dart:html HttpRequest.get/getWithCredentials 
And as always, view the changelog for the full list of changes, and to get started with the Editor see our tutorial.
We invite you to join our Dart mailing list, ask questions on Stack Overflow, or file feature requests on dartbug.com.

Popular posts from this blog

Dart in 2016: The fastest growing programming language at Google, 2nd fastest growing in TIOBE Index

Dart was the fastest growing programming language at Google in 2016 with millions of lines of code written. It also made it to TIOBE Index Top 20 this month (see TIOBE's methodology).

It takes time to build something as ambitious as Dart and, in some ways, Dart is still in its infancy. But we're glad the hard work is starting to pay off.

Many thanks to our amazing community!

We're going to celebrate by ... releasing 1.22 next week (as per our usual 6 week release schedule).

AngularDart is going all Dart

Until now, the multiple language flavors of Angular 2 were written as TypeScript source, and then automatically compiled to both JavaScript and Dart. We're happy to announce that we’re splitting the Angular 2 codebase into two flavors – a Dart version and a TypeScript/JavaScript version – and creating a dedicated AngularDart team.

This is amazing news for Dart developers because:

The framework will feel more like idiomatic Dart.It will make use of Dart features that couldn't work with the TypeScript flavor. It will be faster.
This is equally great news for our TypeScript and JavaScript developers, by the way. Cleaner API, performance gains, easier contributions. Read more on the Angular blog.

Angular 2 for Dart is used by many teams at Google. Most famously by the AdWords team, but many other Google teams build large, mobile-friendly web apps. Some of the top requests from these teams were: make the API feel like Dart, provide a faster edit-refresh cycle, and improve applicat…

The new Google AdSense user interface: built with AngularDart

AdSense is a free, simple way to earn money by placing ads on your website. The team just launched a completely new version of their app for publishers. Read all about it here. We asked Daniel White, the tech lead for the project, some questions because the new UI happens to be built with Dart and Angular2.


AdSense launched way back in 2003. How long is it since the last big redesign?
Last big redesign was called ‘AdSense 3’ and launched about 6 years ago. It was written in Google Web Toolkit (GWT) and the UI has evolved through several iterations - but this is the first ground-up redesign in 6 years. There are a number of long-standing UX issues that we’ve taken the opportunity to solve. A big shout-out to our UX team who’ve been 100% behind this project. We couldn’t have done it without them!

How many software engineers worked on the project?
Purely on the AdSense applications, we have a team of close to 100. Around 25% of them write Dart.

How many lines of code?
We have around 160K LO…