My exploration of Google "go" programing language

1. return
Named return variables are available within the scope of the function. Consider the following funciton

func SomeFunc() (foo int, bar int) {
  // notice how foo and bar is already defined in the body and a return w/no arg returns those values
  foo = 10
  bar = 20
  return // compiler knows it has to return foo & bar
)

2. Type Assertion (ala dynamic_cast)
Given an interface type, it can be coerced to another interface type (at runtime) provided the underlying type supports both the interfaces

Look for type assertion here (Go For C++ Programmers). You have to scroll down to the relevant section. Just use browser search - use type assertion

3. defer - a piece of code to run when the surrounding function returns. Cool feature! See Here

4. dot import

Import declaration          Local name of Sin
import . "lib/math"         Sin (as opposed to math.Sin)

See go-doc - import