When did the "function ans = " trick start working again?
It started to work when Cody server upgraded its MATLAB to R2016b. So strictly speaking, it's not just a Cody trick, but a MATLAB R2016b feature. This feature was somewhat discontinued in R2016a, but it works in many earlier versions.
Reverse the vector
Do Fast Fourier Transformation
Length of a short side
Times 3 problem
Speed of car
Non trivial identities - summation
Probabilities - Balls and urns - 01
Probabilities - More brains than luck
Area of polygon
Non trivial identities - differentiation
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