Go slices

main.go

package main

import (
	"fmt"
	"reflect"
	"unsafe"
)

func main() {
	s := make([]string, 1, 2)
	sh := (*reflect.SliceHeader)(unsafe.Pointer(&s))
	fmt.Printf("%#v\n", sh)
	fmt.Printf("%#v\n", s)

	s[0] = "hello"
	fmt.Printf("%#v\n", sh)
	fmt.Printf("%#v\n", s)

	s = append(s, "world")
	fmt.Printf("%#v\n", sh)
	fmt.Printf("%#v\n", s)

	s = append(s, "!")
	fmt.Printf("%#v\n", sh)
	fmt.Printf("%#v\n", s)
}