Yes. In my solution I assumed that input can only have numbers (per description), so I thought it would be not necessary to check that first and last characters of combined scrill are also a numbers

Great! But I think with ^...$ it would be stricter
/^(\d{3})(\d{3})(\d{4})$/

Regex can be really slow in certain situations.

Haskell has a problem with random tests. The random tests expect incorrect things, but you can just retry submitting until you get a pass. Following example is real, but I clipped it for length.

[8688,1372,6232,-35,-326,-6003,12892,6694,5299,-6213,1820,-2033,-7269,8660,307,4670,-6318,8339,8634,7146,15519,16743,11907,-9307,16726,19276,12766,-9192,-4597,13631,-5004,8612,6564,-9585,5116,16598,-9586,15430,12452,-569,-177,-6273,-6868,19138,3132,12539,17978,8804,-4987,10639,13348,5739,7088,13451,-1915,14140,-7536,-8051,-5624,…clipped for length]
  2
expected: "yes, ascending"
 but got: "no"

This array is not sorted and should not expect "yes, ascending."

Fuzzers! I need fuzzers in the Elm tests! Thank you so much a) for translating (which I totally should have done) and b) for reminding me how to make a dang fuzz test!!

Haskell translation

Resolve this once you've got some tests that categorically reject my solution then. You probably also want to tune the test generation so that things are always some epsilon in/outside the ellipse just incase.

Python:

Point attributes should be accessible like normal attributes (p.x, p.y).

Python:

• No assertion messages
• Test framework abuse

Also, idc about ppl submitting my solutions, but in general if you wanna test a solution just open the fork panel and do it there. You can add debug stuff to the tests as well then.

First one I could generate: {'x': 88, 'y': 25} {'x': -27, 'y': 87} 261.29676614914314 {'x': -68, 'y': 0}, for which the reference solution claims is inside the ellipse whilst mine claims it is outside.

For what it's worth doing the calculations using arbitrary precision decimal libraries in other languages agrees with my solution here.