Javascript leading the way? What are you talking about?

First class functions is a concept from mathematics and many programming languages had this feature way before javascript existed, and I simply don't understand exactly what concept of Go's lexical scoping resembles anything exclusive of javascript.

I don't understand the last paragraphs about methods with data and data with methods, but Go's structs resembles C's structs, binding methods to a struct is an thing I've only seen in Go, but maybe some other programming language had this before.