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.
Number of 1s in a binary string
Rotate a Matrix by 90 degrees
Find nearest prime number less than input number
Given a matrix, return the last eigen value
Back to basics 2 - Function Path
Valid Chess Moves
Back to basics 20 - singleton dimensions
Back to basics 23 - Triangular matrix
Toolbox check part 3
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