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.
Find all elements less than 0 or greater than 10 and replace them with NaN
Remove NaN ?
Angle between two vectors
Change the sign of even index entries of the reversed vector
Numbers spiral diagonals (Part 2)
Stress-Strain Properties - 6
Divisible by n, Composite Divisors
Word Distance - Sum
Lights Out 10 - 5x5, with wrapping, 6 moves
Divisible by 14
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