Covering some basic topics I haven't seen elsewhere on Cody.
Return the number of punctuation characters in the input variable.
Trouble in the test suite :)
I think the problem is with Cody itself today. It's doing weird things. If you submit this solution again it fails.
Swap the first and last columns
peta to nano (x-ray)
Sum of diagonal of a square matrix
Given a matrix, return the last eigen value
Back to basics 15 - classes
Back to basics 23 - Triangular matrix
2 b | ~ 2 b
Back to basics 7 - Equal NaNs
Back to basics 11 - Max Integer
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