I understood nothing about the problem at all. What is availableweekdays ? No wonder I do not understand any of the solutions. I did not get the problem statement itself.

bad ass

Wow!

Very clever!

Just for curious newbies, this approach bug-prone because it will fail without throwing an error if the first string contains a space character already.

In order for this solution to work reliably, it must use a delimiter which is guaranteed to be absent from the source strings.

Very nice mathematical kata of the series, congratulations and thanks for it.

oh. oh this is incredibly elegant. my brain thinks too long haha

.

.

Took a similar approach, but I overcomplicated it.. Nice one! :)

This will not filter negative value. Moreover -0.5 would be an edge case of your function since you're not taking care of non-integer numbers.