Additional test cases have been added.
I guess the test suite needs some improvement.
Swap the first and last columns
How to find the position of an element in a vector without using the find function
Whether the input is vector?
Square the input
Check if there are white spaces in the input string
ASCII sum of phrases
basic matrix operations: rotate and find sum of diagonal elements of the resultant matrix
Calculating the total earnings of a factory
Return median of a matrix
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