Replicate each element of a row vector (with NaN) a constant number of times.
n=2, A=[1 2 3] -> [1 1 2 2 3 3]
n=0, A=[2 1] -> 
Create a cell array out of a struct
Compute a dot product of two vectors x and y
Is it an Armstrong number?
04 - Scalar Equations 3
Numbers spiral diagonals
Find my secret number
Two functions (to be sure)
Negation and new variables
Decrypt the cypher using XOR encryption (for beginners)
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