CoffeeScript

• no sample tests

Java - random test cases do no pass sometimes.

Ruby 3.0 should be enabled

Should define what is a word and what is the end of a word.

in Java, actual and expected are reversed

missing edge cases: "words" ending with digits -> shouldn't be changed.

Random tests are vulnerable to input modification.

Why literally every kata about bookmaker always has inadequate explanation about the whole subject?

Your "anti-cheat" relies on Function.prototype.toString(), which is totally useless. You should obtain user source code instead.

Even with that, this kata's concept is a duplicate to some existing katas. Even with the additional requirements (that is ridiculous IMO) it does not make this kata new.

I would like to know, in your example of the description, how to calculate 20% ?

I'm getting this error:

Random Tests
Fraction = 7560/3256
[945, 407] should equal None

Both 7560 and 3256 are divisible by 8. I don't understand why the function should return None

Random tests fail weirdly : . . .

// array = shampoo,beer,apple,wine,toothpaste,beer,wine,toothpaste
Test Passed: Value == ["beer","wine","beer","wine","shampoo","toothpaste","toothpaste","apple"]  //-- ok 

// array = beer,apple,rice,wine,rice,apple,beer,shampoo
Expected: ["beer","beer","beer","beer","beer","beer","beer","beer"],     // <-- what the ?!?
instead got: ["beer","wine","beer","rice","rice","shampoo","apple","apple"]

// array = wine,banana,banana,apple,rice,shampoo,beer,shampoo
Expected: ["wine","wine","wine","wine","wine","wine","wine","wine"],     // <-- again !???
instead got: ["wine","beer","rice","shampoo","shampoo","banana","banana","apple"]

// array = banana,beer,wine,banana,toothpaste,toothpaste,toothpaste,shampoo
Expected: ["beer","wine","wine","wine","wine","wine","wine","banana"],  // <-- ???
instead got: ["beer","wine","toothpaste","toothpaste","toothpaste","shampoo","banana","banana"]

... it seems sometimes 'beer' or 'wine' floods the output !

Can you explain me why ?