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...
Sums with Excluded Digits
peta to nano (x-ray)
Return unique values without sorting
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Add two numbers
Next Higher Power of B
Specific Element Count
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