On: Go is amazing, period.

[4ad]

:= and = don't do what you probably think they do, the meaning is not the same as in Pascal. If you need to compare two variables, you use ==

    if a == b {}

= is the usual assignment, := declares and initializes a variable inferring the type.

    var a int
    a = 42

vs.

    a := 42

That means you'll see explicit types in variable declarations rarely.