just out of curiosity, could you mention how it is messy? the only error i understand is that the code doesn't check the each parameter fully. isn't that the only thing that needs to be corrected?

very tidy solution. Like this

Clever :)

Yeah but this is messy "code" I don't understand how he gets the best practice?

ascii characters are actuallt just integers, there's an ordered ascii character chart wich is useful to understand these kinds of opertations, wich exploit the order of the chart to maximize efficiency

Thanks for clarification :D

So "rapper" beats "soprano"?

Awesome. It's definitely the best practice

A lambda is just a function created with a single expression and no name. So, the difference is negligible

For those who struggle with it:
You need to return the max possible difference between the single string length from the first array and the single string length from the second array.
P.S.: Nice kata, but I would give it 6 kyus.

Nice Kata. Makes to think in different ways simultaneously