Getting Started

You can follow the official dart getting started guide here.

Here are some of the ways you can contribute to fart.

Implementing an extension method

You'll need to know how extension methods and generics work in dart. Don't worry, it's pretty much like C#.
It's not necessary that the functions chain into a final lazily-evaluated iterator.
It's not necessary that the functions are performant. Although, bonus points if you manage that, I guess?
If a method already exists in the standard dart library for doing something LINQ-y, you're not allowed to use it in your implementation.

Writing tests for an extension method

One assertion allowed per unit test.
You can try to use the Arrange/Act/Assert paradigm for your unit tests (this is not a rule but it will make me happy).

PR Rules

No more than one implementation per PR
No more than one unit test per PR
An implementation and a unit test can be in the same PR
Multiple PRs for the same method are welcome, as long as the implementation is different.