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...
Remove any row in which a NaN appears
Test for balanced parentheses
Area of a triangle
Recurring Cycle Length (Inspired by Project Euler Problem 26)
Check to see if a Sudoku Puzzle is Solved
Lychrel Number Test (Inspired by Project Euler Problem 55)
Parse me a Lisp
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