this is too much.

Attractive solution! Despite the unnecessary conversion to an indexed list (2x), I love the for comprehension skills. Very clever!

This solution seeks to:

1. Validate the input in one pass only
2. Return false as soon as an error is found without needing to reach the end of the input
3. Hint at an API for return an error message to indicate invalidations.
4. Also, account for handling input with other characters like def do_sum({n1, n2, n3}), do: [n1, n2, n3] |> Enum.sum() as this would be a valid use of braces also

Interesting. So, you are using a defmacro in place of a defguard? I'm assuming that a defguard IS a marco then. Interesting.

Yikes! This is pretty rough.

Just testing my uniq_bubble_sorting function against using Elixir's Enum.sort and Enum.uniq.

Silly challenge. I still like this solution way better than my first one.

I hate this solution.

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no.