dang how did we all end up with the exact same code lmfao

Nice.

Much better than mine

Also, for lists it returns True if not and empty list

Wooow. I`ll save it as an great example of using lambda functions

if result: is the same as writing if result == True: if checks the validity of the condition.

This is awesome!

Can you explain the reduce?

Yeah, you are right, missed that, should have used an approach like any(e in ...) ^^.

This is not correct. It will give false positives, for example if array1 = ["abc"] and array2 = ["cab", "cat"], r will be ["abc"] but should be []. Nice approach otherwise.