bortzmeyer
An interesting mistake of ChatGPT
When asked to decompose a number into prime factors, ChatGPT produced:
defmodule PrimeFactors do
def factors(n, divisor \\ 2) when divisor > n do
[n]
end
def factors(n, divisor \\ 2) do
if rem(n, divisor) == 0 do
[divisor | factors(n / divisor, divisor)]
else
factors(n, divisor + 1)
end
end
end
It fails compilation since you cannot have two definitions with default values. I wonder if it worked in previous versions of Elixir?
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whatyouhide
No, as far as I can recall this never worked in Elixir, because it semantically wouldn’t really make sense. Ah, ChatGPT… 
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