you should ease up numerically on equality, so my solution works :)
The polar inertia is the sum of the squared distances of all points from the origin. https://en.wikipedia.org/wiki/Polar_moment_of_inertia
Make a checkerboard matrix
Swap the first and last columns
Solve the Sudoku Row
middleAsColumn: Return all but first and last element as a column vector
Simple equation: Annual salary
Vectorizing, too easy or too hard?
speed vs size
Use of regexp
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