my code outputs that everything is correct except for empty arrays, like this error: last( [] ) == null - Expected: null, instead got: undefined.
what's wrong with it?

voted as "somewhat" for being at 8-kyu-level.

I've started from filter, but the test found it incorrect, and then I tried many methods, including endsWith, for loop, map, when I re-read the task and found out that it was saying to output even numbers, when I was trying to output odd ones. What a waste of time by me

I imagine putting this code on a simple calculator.

I solved the kata with while loop, but have exactly no idea what's going on here.

thank you for the explanation bro! it's very necessary for gods of js like me :D

Coding is a good job if you love it or just got interested in it. If you see no meaning in it, find another job, but if you see some, learn it step-by-step. It's like any other job will start rewarding you, but unlike the others, it'll do it exponentially. Like "the more you give, the more you get**2"

This kata of 6kyu took me 3 minutes to solve, whereas I know some 8kyu katas that had taken hours!

kill the system. I love it

for 1 hour I was just staring at the code and didn't know how to solve my problem, now I see that it was only in adding the ",0" part in reduce. please let me cry.

you are not alone bro, same here