Given a input vector x, return y as index-powered vector as shown below.
x = [2 3 6 9]
then y should be
[2^1 3^2 6^3 9^4] = [2 9 216 6561]
Extract leading non-zero digit
Return unique values without sorting
Given a window, how many subsets of a vector sum positive
Given a 4x4 matrix, swap the two middle columns
multiply by three
Given an input string, generate a variable name out of it
Sum of diagonals elements of a matrix
Broken numlock key, oppps !
Back to basics - array operations
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