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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
My solution does not work if the string contains numbers. E.g. console.log(printerError("0") // "1/1" in stead of "0/1"
@teranetmk Fantastic! Very clever to use the optional chaining operator to deal with null.
I realize that I used way too much unnecessary(!) variables. I still need to practice chaining. :-)