I was trying to do something similar with the fill method, and eventually gave up.

感谢新思路！

This is soo good, i am very very impressed

great

How does it work?

Solved in very short way intresting!!

Nice this one is shorter than my solution, grate job!

i feel like doing this in one line isn't an 8 kyu

Please use spoiler flag next time.

i have started in the same way, got lost in the middle.
Thought my logic of approach was wrong, glad to find the way.
Am i right if i say the limit/int gives you the number of multiples that will appear in the array?

If you don't fill, the array is considered empty for .map, so .map returns an empty array. You can fill it anything, even undefined, but you have to do it or otherwise map doesn't do anything.

If the integersList has only one item, this piece of code "integersList.join().split(digitsList[i]).length -1" does not give zero?

i think fill(1) is not necessary, because x is not used in map()

This is great. I was working on the same thing and was having an issue working out the map method. Brilliant!

I run into the same problem in js, too :<