Hi Balaji, > Thanks for pointing this out. You are right with how the data types are > calculated, similar to collection >> commonSuperClass. But this time, it is > calculated only during the creation of DataFrame once and for all.
That sounds good. > A nil value, or a Series of nil values yields UndefinedObject as its super > class. There was an error with the dataset used on that example blog post. > I have corrected it now. OK, that explains my confusion. Cheers, Konrad.
