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Tuple.append/2 is deprecated. Use insert_at instead #300
Description
I started learning Elixir this week and I'm going through the koans. I got a warning on the following koan at 05_tuples.ex:
koan "Add things at the end" do
assert Tuple.append({"Huey", "Dewey"}, "Louie") == {"Huey", "Dewey", "Louie"}
end
Apparently, Tuple.append has been deprecated since Elixir v1.18.0.
On Elixir's documentation (at https://hexdocs.pm/elixir/Tuple.html) they say the following:
"To append to a tuple, it is preferable to extract the elements from the old tuple with pattern matching, and then create a new tuple"
Since I'm new to Elixir, I don't know how to do that yet. But if anyone has the time to explain it to me, I'll gladly open a PR with the change.
Activity
iamvery commentedon Sep 19, 2025
Thank you for reporting! What they mean is that this example would change from:
to something like
We should fix the deprecation warning, and to be honest I think it makes the most sense either remove this koan or adjust its purpose to illustrate that "extending" a Tuple is just creating a new Tuple.
iamvery commentedon Sep 23, 2025
This is fixed in #299