feelsBadMan

Well replace would reduce the number of characters before the split, resulting in a shorter array for filter to spin through. Since each array element is a string, then fewer String objects are created.

I know it's an old question but I would love to know the answer to this one!

No.

Can you explain why it is O(n) and O(2n) if function be outside or inside please? Tnx

certainly not a best practice. clever, yes

How does filter compare to replace performance-wise?

This is clever, but I don't know why anyone would vote for a nested ternary as a best practice

Wouldn't it be better to define the sort callback outside? That way you get O(n) instead of O(2n) right?

Mostly just impressed you took the time to write all that out