first.replace is not a function

[ghost]

All in the title.

[RiccardoManzan]

Similar here, i got "second.replace is not a function" in compareTwoStrings()

Any thoughts?

Edit: My fault, i was passing a null value sometimes, "fixed" adding || "" after the variables

[ianengelbrecht]

Suggested to update the docs to say that string 1 and string 2 passed to compareTwoStrings() must not be null, or check the vals passed in and throw an error if either null rather than relying on the error throw by null.replace().