string_interning.go

package main

import (
	"fmt"
	"unsafe"
)

func stringptr(s string) *byte {
	return unsafe.StringData(s)
}

func sliceptr(s []uint64) *uint64 {
	return unsafe.SliceData(s)
}

func A() string {
	return "an example string"
}

func B() string {
	return "an example string"
}

func C() []uint64 {
	return []uint64{1, 2, 3, 4, 5, 6, 7, 8, 9}
}

func D() []uint64 {
	return []uint64{1, 2, 3, 4, 5, 6, 7, 8, 9}
}

func main() {
	fmt.Println("STRING INTERNING IN GO")
	fmt.Printf("first string underlying array address:  %v\n", stringptr(A()))
	fmt.Printf("second string underlying array address: %v\n", stringptr(B()))
	fmt.Printf("Are the string addresses equal? %v\n", stringptr(A()) == stringptr(B()))
	fmt.Println("NO SLICE INTERNING IN GO")
	fmt.Printf("first slice underlying array address:  %v\n", sliceptr(C()))
	fmt.Printf("second slice underlying array address: %v\n", sliceptr(D()))
	fmt.Printf("Are the slice addresses equal? %v\n", sliceptr(C()) == sliceptr(D()))
}