merge init/pointer example to https://github.com/crazybber/go-fucking-exercise/tree/master/basic

playground/init/main.go

@@ -1,13 +0,0 @@
-package main
-
-import (
-	"github.com/davecgh/go-spew/spew"
-)
-
-func init() {
-	spew.Dump("inited")
-}
-
-func main() {
-	spew.Dump("Test")
-}

playground/pointer/pointer_test.go

@@ -1,26 +0,0 @@
-package pointer
-
-import (
-	"fmt"
-	"testing"
-)
-
-func TestBasic(t *testing.T) {
-	answer := 42
-	fmt.Println(&answer) // & is address operator
-
-	address := &answer
-	fmt.Println(*address)                     // * is dereferencing, which providers the value that a memory address refers to.
-	fmt.Printf("address is a %T \n", address) // print the pointer type
-
-	var address2 *int  // declare a pointer
-	address2 = address // address2 can store some pinter type
-	fmt.Println(*address2)
-
-}
-
-func TestPointer(t *testing.T) {
-	var test *string = new(string)
-	*test = "123"
-	fmt.Println(test)
-}