Copied sample tests to attempt tests.

Fixed.

It looks like you accidentally modified the test code. Save your code somewhere else, reset the trainer and test again.

For me everything worked, so closing.

Test in task is wrong

TSError: ⨯ Unable to compile TypeScript:
test.ts:6:12 - error TS2554: Expected 2-3 arguments, but got 0.

6 assert.deepEqual(),["Mallard", "Hook Bill", "Crested", "Blue Swedish"]);
~~~~~~~~~~~

node_modules/.pnpm/@types+chai@4.3.4/node_modules/@types/chai/index.d.ts:516:22
516 deepEqual(actual: T, expected: T, message?: string): void;
~~~~~~~~~
An argument for 'actual' was not provided.
test.ts:6:5 - error TS1005: ',' expected.

missing fixed tests for js

Scala translation

Enabled in this fork

Lua translation!

forked and approved

I found the discription a bit hard at first, but then I understood it.

Haskell translation

This exercise taught me a lot of other related functions, super useful.

It's not really that hard. Clear instructions:
You have a list of geese already made.
You just remove any item common in the geese list and the array to be filtered you get.
That's it?

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