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.
Getting logical indexes
Magic is simple (for beginners)
find the maximum element of the matrix
Back to basics 20 - singleton dimensions
Back to basics 12 - Input Arguments
Back to basics 13 - Input variables
Back to basics 3 - Temp Directory
Back to basics 11 - Max Integer
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