Find the sum of the elements in the "second" diagonal
Determine Whether an array is empty
Calculate the area of a triangle between three points
Max index of 3D array
Given a 4x4 matrix, swap the two middle columns
Right Triangle Side Lengths (Inspired by Project Euler Problem 39)
THE CALCULATOR OF LOVE
Check to see if a Sudoku Puzzle is Solved
N-Dimensional Array Slice
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