we are supposed to fix the code!!! NOT write a new one....

duplicate and almost positive my logic was incorrect but i still passed

Duplicate.

Random tests added

Random tests added

Random tests added

Fixed

"if you don't say it, they cannot learn" ;)

Especially on white katas, so. ;)

Well, this is a white kata...

Bad, bad, bad... This is very bad!!

Upvoting a O(n) solution while a simple constant time one exists! This is bad! (And I talk about the people upvoting the solution!)

It'll return false, as it wouldn't be a valid tail: make sure that the second argument (tail), is the same as the last letter of the first argument (body)

What if tail.length > 1?

You need a lot more test cases

as donald says. needs more than the 2 test cases from the description.