would you consider pulling the stick out of your ass? :/

Would you consider using better language to express cluelessness next time?

good

and there was me thinking I was clever using array.some()

did the same, and feelt dumb after seeing this variation hahaha

Ohhhhh, really goood

Very smart lol

lol. makes sense.

I personally think that is best use do filter and includes since these are functions that can (and mostlikely will) be otmized by the interpreter/compiler.

What you did is still valid tho, but is better to use Set instead of creating a new array with the element/boolean formant

me pude ahorrar muchas lineas con esta solución

Nice!

Man this is genius! I totally forgot about .includes(). I ran a forEach on b. 😅

What would be the optimal solution?

I believe that by using includes, the code will have to check the entirety of b array for each the value of array a, resulting in time complexity of O(n * m)