.

merged :)

Oops, overlooked that. Fixed here

forgot to check for tables, they're misaligned actually: image

looks fine, approved

js fork with more balanced random tests. Please review before approval, thanks

Edit: Got approved.

Made this fork in JS.
Below is a representation of the average number of duplicates on 7 runs (700 tests). The indexes (0-99) are the number of duplicates for the test and the values are the number of time this number of duplicates was the solution.

Let me know what I could improve !

[
  0, 2, 1, 0, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 2, 1, 1, 1, 0, 1, 2,
  1, 1, 2, 1, 1, 2, 1, 2, 0, 1,
  1, 1, 2, 1, 2, 1, 0, 2, 1, 1,
  1, 2, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 0, 1, 1, 0, 1, 1, 0, 1,
  1, 2, 1, 1, 1, 1, 0, 0, 1, 1,
  1, 1, 1, 1, 1, 1, 2, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 2, 1, 1, 1,
  1, 1, 1, 2, 1, 1, 1, 1, 1, 2
]

Approved

On average, ~65% of the random tests contain no repetitions, ~25% contain only a single repetition, and ~10% contain two repetitions. Even for the largest list size of 100 records, you have low chances of getting more than 4 repetitions. If you think this is a fine distribution, you can close this issue, but I think it's a bit lacking.

Lua translation !

i think the description would benefit from mentioning the technical term parallel arrays somehow

the OP made an additional fork with making the description lang-agnostic, approved now

Haskell translation