If my over-use of str2num has in any way caused offense, I hereby beg leave to apologize.
My hat's off to you for such a solution. I'm baffled as to how to decode it (pun intended). I know that there has been a lot of furor over the use of regexp and other string-based functions, conversions, etc. to lower solution sizes for problems in general, but this problem is string-based, so I see no problem in solving it via arcane string methods.
What is the next step in Conway's Life?
Remove NaN ?
Back to basics 22 - Rotate a matrix
System of equations
Narcissistic number ?
Lights Out 14 - 5x5, four stages, x moves
Divisible by n, Truncated-number Divisors
Scrabble Scores - 9
Rule of mixtures (composites) - reverse engineering
Divisible by 15
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