Append in slices creates a new underlying array

slices_append_newarray.go

package main

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

func main() {

	vegies := [...]string{"Potato", "Tomato", "Eggplant", "Onion", "Capsicum"}
	vegslice := vegies[1:3]
	/* Returns
	[Tomato Eggplant] 2 4
	Pointer to the underlying array 824634236944 */
	fmt.Println(vegslice, len(vegslice), cap(vegslice))
	hdr0 := (*reflect.SliceHeader)(unsafe.Pointer(&vegslice))
	fmt.Println("Pointer to the underlying array", hdr0.Data)

	vegslice = append(vegslice, "Okra", "Cabbage")
	/* Returns
	[Tomato Eggplant Okra Cabbage] 4 4
	Pointer to the underlying array 824634236944 */
	fmt.Println(vegslice, len(vegslice), cap(vegslice))
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&vegslice))
	fmt.Println("Pointer to the underlying array", hdr.Data)

	vegslice = append(vegslice, "Lettuce", "Bottlegaurd")
	/* Returns [Tomato Eggplant Okra Cabbage Lettuce Bottlegaurd] 6 8
	Pointer to the underlying array 824634245120 << Changed */
	fmt.Println(vegslice, len(vegslice), cap(vegslice))
	hdr2 := (*reflect.SliceHeader)(unsafe.Pointer(&vegslice))
	fmt.Println("Pointer to the underlying array", hdr2.Data)
  
}