Functional Programming Example in Dart

xster
xster
Feb 26, 2014 · 1 min read

For a quick reference.

At the time of writing (Feb 2014), the top results from a Google search on ‘Dart functional programming’ or ‘Dart list comprehension’ don’t immediately yield clear examples. That’s crazy given that Dart is such a boss language. So here’s an example:

// double all values
List myList = [1, 2, 3, 4];
List doubledList = myList.map((x) => x * 2);

You can do the standard map, reduce, filter on Iterables on Dart. Of course you can chain them up like other languages. Although it’s not strictly using the set building notation like in Python, you can still pretty much do everything so something like:

[x * 2 for x in myList if x % 2 == 0]

in Python would look like:

myList.where((x) => x % 2 == 0).map((x) => x * 2);

xster

Collection of tech tips and learnings

Medium is an open platform where 170 million readers come to find insightful and dynamic thinking. Here, expert and undiscovered voices alike dive into the heart of any topic and bring new ideas to the surface. Learn more

Follow the writers, publications, and topics that matter to you, and you’ll see them on your homepage and in your inbox. Explore

If you have a story to tell, knowledge to share, or a perspective to offer — welcome home. It’s easy and free to post your thinking on any topic. Write on Medium

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store