Not really but going for clickbait title 
What's the neatest reporter you can come up with to take a number surrounded by space chars (bonus points for any whitespace char) e.g " 5 " (5 surrounded by two spaces at each end) and just return the 5.
If the input is not considered numeric e.g "A5 ", (A,5 and two spaces) then it should return it untouched
Accidentally made this a predicate instead of a reporter, but the script should work!
I think you'll win the prize for most complicated way of doing it
But it works
Man I love javascript
The reason I compare trimmed to join (num) + is because when you set a veriable to NaN, it turns into 0.
Edit, here's a much more simplified version
Que?
2nd solution looks good
I said that because math calculations are done in javascript, so the javascript quirks still apply.
aah - got you
Here's essentially a single-block script doing the job:
It does handle e.g. " 5 4 " as a number (54) though, so I'm not sure if it qualifies.
Nice that it handle "5 4" (but not a requirement - this is for when I've parsed an AdventOfCode puzzle input but there is invisible whitespace surrounding numbers)
But it only handles " " and not all whitespace like @ego-lay_atman-bay so it's got 2nd prize
If that's what you want, try this one-block script: 
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