package main

import (
	"fmt"
)

type A struct {
	val int
}

type B struct {
	a *A
}

func main() {
	fmt.Println("Hello, playground")
	as := []A{A{0}, A{1}, A{2}, A{3}, A{4}}
	bs := make([]B, 0, len(as))
	for _, a := range as {
		// a := a // scope for fixing this annoying
		fmt.Printf("pointer = %p \n", &a)
		bs = append(bs, B{&a})
	}

	for i, b := range bs {
		fmt.Println("i = ", i, "b = ", b, "b.a.val = ", b.a.val)
	}
}

Hello, playground
pointer = 0x40e020 
pointer = 0x40e020 
pointer = 0x40e020 
pointer = 0x40e020 
pointer = 0x40e020 
i =  0 b =  {0x40e020} b.a.val =  4
i =  1 b =  {0x40e020} b.a.val =  4
i =  2 b =  {0x40e020} b.a.val =  4
i =  3 b =  {0x40e020} b.a.val =  4
i =  4 b =  {0x40e020} b.a.val =  4