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...
Extract leading non-zero digit
First non-zero element in each column
peta to nano (x-ray)
Return elements unique to either input
Guess the Coefficients!
ASCII Birthday Cake
Lychrel Number Test (Inspired by Project Euler Problem 55)
Project Euler: Problem 16, Sums of Digits of Powers of Two
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