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.
Get the area codes from a list of phone numbers
Back to basics 23 - Triangular matrix
Reverse a matrix
Area of a triangle
Back to basics 6 - Column Vector
Back to basics 10 - Max Float
Back to basics 16 - byte order
Back to basics 2 - Function Path
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