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...
Test for balanced parentheses
peta to nano (x-ray)
Angle between Two Vectors
Output any real number that is neither positive nor negative
kmph to mps
Guess the Coefficients!
Roll the Dice!
Clock Hand Angle 1
Reverse the Words (not letters) of a String
Right Triangle Side Lengths (Inspired by Project Euler Problem 39)
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