parseNumbers returns NaN on empty strings.

[6farer]

When use the preprocessor parseNumbers, it returns NaN for empty string values. Is this expected? I would prefer to leave the value as is (I'm parsing a large object).

isNaN('') === false however parseInt('') === NaN

If this is everyone's desired behaviour, please ignore my issue. If this isn't what people are expecting, I can submit a PR. I will see if there are any comments on this issue. In the meantime I will use my own preprocessor.

[Jzeemo]

I am having the same issue. I expected that it should return as an empty string.