Find the sum of the elements in the "second" diagonal
Rotate input square matrix 90 degrees CCW without rot90
Reverse the elements of an array
Dimensions of a rectangle
Sum the 'edge' values of a matrix
Matrix Max Finder
Replace 0 indices in array with 1's
Check if inputted variable is a string or a number
Find the sum of the largest two elements in a vector
String Delimination and Outputting
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