my solution has less lines (which isn't always better) and 1 less array in memory, but you've done the 2 most important things.

1.Correct Results

2.Readable and easy or another developer to understand your code.

Thank you so much!

Mine was much longer and less semantically clear. I like this one!

I need to improve my RegEx skills...

I totally misread this problem. I thought they were asking for when the father's age would be twice as much as the son's age AT THE PRESENT TIME, ugh.

The performance difference is negligible between the two

I get it now!

I like this, but I think the two line solution is more readable.

Wish I knew about this one :)

I like this one. Mine was a bit longer heh.

I learned a ton from looking at this one. Thanks! Filtering out empty strings, because they evaluate as false, was very clever.