Given a ColorSpec string, either in short or long form, return the corresponding RGB triplet. If the input is not a valid color, return an empty vector.
str2rgb('red') returns [1 0 0]
str2rgb('k') returns [0 0 0]
str2rgb('pizza') returns 
When I see beautiful and efficient Ly Cao solutions, I have the feeling that Cody has found another master (after Alfonso).
Thank you. I'm flattered. I still have a lot to learn.
Find the biggest empty box
Calculate the area of a triangle between three points
Make a 1 hot vector
Multiples of a Number in a Given Range
Remove the Zero
Pentago: find winning move
Convert matrix to 3D array of triangular matrices
Concatenate string with cell array of strings
Convert RGB triplet to ColorSpec string
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