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...
Get the area codes from a list of phone numbers
Given a window, how many subsets of a vector sum positive
Equal to their cube
Find the hypotenuse
Area of an equilateral triangle
Return the Nth Output from an Input Command
Pull the variable y_correct from the Caller's Workspace
Return the first and last character of a string
Project Euler: Problem 16, Sums of Digits of Powers of Two
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