"oh you're a historian? Name every date"

the only true solution

upvoted this for best practices

If you compare both 180 and 90 in string form as such:

"180", "90"

You can see that "180" is lexicographically less than "90"

Try console.log(originArr) and see the intermediate result of your array before sorting takes place. Note that the given string can be empty.

Also, your code does not meet this criteria:

When two numbers have the same "weight", let us class them as if they were strings (alphabetical ordering) and not numbers:

180 is before 90 since, having the same "weight" (9), it comes before as a string.

expected '0' to equal ''

What?