"cat" is a really nice touch for concatenation of those arrays! your solutions never fail my expectation.
by the way, i saw that "sub-func" comment...:)
Calling the two sub-functions the right way will not hurt your score. Great work though. :)
Who knows the last digit of pi?
Back to basics 26 - Keywords
Return elements unique to either input
Generate this matrix
Sum the 'edge' values of a matrix
Add a vector to a matrix
Sum of adjacent elements in a vector
Find the starting index of a consecutive condition
Triangle of numbers
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