Covering some basic topics I haven't seen elsewhere on Cody.
Return a string that is the path to the system's current temp directory
The assert is wrong. Dirs should not be tested as equal strings - slash can be omitted.
Prime factor digits
Getting the row and column location from a matrix
Duplicate each element of a vector.
Derivative of polynomial
Duplicate a character
Back to basics 8 - Matrix Diagonals
2 b | ~ 2 b
Back to basics 19 - character types
Back to basics 1 - Saving
Back to basics 23 - Triangular matrix
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