Typy – type checking library for JavaScript with a 'sweeter' syntax

For the nested object traversal, is there a reason this uses string based paths instead of array based? Dynamic path building via string concatenation feels messy.

Seems like there may be a performance hit too with all the string operations inside 'utils/getNestedObject'. Probably not an issue for messing around in small amounts of data, but using this to manipulate a big server response could run into issues.