package main
import (  "fmt"  "github.com/alberliu/mydb"  "strconv")
func toBytes(i int) []byte {  return []byte(strconv.Itoa(i))}
func main() {  db, err := mydb.Open("data")  if err != nil {    panic(err)  }
  fmt.Println("init: ", db.Range(mydb.Infinity, mydb.Infinity))
  for i := 1; i <= 5; i++ {    db.Add(toBytes(i), toBytes(i))  }  fmt.Println("add:  ", db.Range(mydb.Infinity, mydb.Infinity))
  db.Update(toBytes(1), toBytes(4))  fmt.Println("update", db.Range(mydb.Infinity, mydb.Infinity))
  db.Delete(toBytes(1))  fmt.Println("delete", db.Range(mydb.Infinity, mydb.Infinity))
  fmt.Println("range ", db.Range(toBytes(3), toBytes(4)))}