I'm not sure what testing you guys are looking for here.
This LoC fixes an issue where values with integer keys can't be deleted, as previously if the key wasn't a string it was assumed to be an object. There is similar code in the blackberry file but I'm not sure if that is required to be a string. All I know is this change works for me, locally.
Don't assume string key - Allow for integer keys
Merge pull request #71 from jordanmaguire/master
Resolves issue where values with integer keys can't be removed