Regex is adding unnecessary overhead here

Powerful code, nice

Please use spoiler flag next time.

Lol I'm the same way. I enjoy seeing these one line solutions, though, because it helps me learn how to write more efficient code

gj)

I kind of forget to do simple logic like this, I just like using for loops similar to how majority of C is operated

NICE

The test doesn't say you should care for undefined or null

smooth hhhhhh but doesnt pass the test with "111" => "1"

it will return ...#6 16

But this code does not pass this test:

'4556 364607 9356 16 ' ... => "################ 16 "