[lucaswoj]

I have a strong reason to suspect that this was written by an intern who was relatively new to the language. It seems to be written by someone in the C/C++/Java mindset (ie how they didn't list "function" as a primitive data type)

[jarek-foksa]

Function is not a separate data type in JavaScript, but they could probably list Object there (EcmaScript defines 6 types and 5 primitive values, I can't really find any definition of "primitive type")