I never know that a funtion call "mode" actually do exist!:lol
Find the sum of the elements in the "second" diagonal
Back to basics 25 - Valid variable names
Given a 4x4 matrix, swap the two middle columns
Find the product of a Vector
Sort complex numbers into complex conjugate pairs
Change the sign of even index entries of the reversed vector
Moving average (variable kernel length)
Duplicate a character
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