Go closure variable scope

Question

I\'m reading \'CreateSpace An Introduction to Programming in Go 2012\'

and on page 86 I found this evil magic

func makeEvenGenerator() func() uint {
             


        

Answer 1

1) Why is i not resetting ?

Closures in Go capture variables by reference. That means the inner function holds a reference to the i variable in the outer scope, and each call of it accesses this same variable.

2) is nextEven() returning and uint or is Println so smart that it can work with everything ?

fmt.Println() (along with fmt.Print(), fmt.Fprint(), etc.) can work most types. It prints its arguments in the "default format". It is the same thing that is printed using fmt.Printf() using the %v verb.