Nice expression for the usage test. Maybe one can add function "dec2base", cause the return type is a String.
The problem description should mention that dec2base isn't allowed either.
This will fail to detect certain palindromes which contain zero e.g. 10101 however the test suite doesn't (yet) contain any such.
There's something strange with the Cody test suites today...
Most nonzero elements in row
Distance walked 2D
Sum the 'edge' values of a matrix
Give the Shortest Path Through The Maze
Triangle Numbers Below N
First N Perfect Squares
Great Circle Distance
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