main.go

package main

// package main

import (
	"github.com/dgraph-io/badger"
)

func main() {

	opts := badger.DefaultOptions("./data")
	opts.Dir = "./data"
	opts.ValueDir = "./data"
	//opts.Logger = nil
	//opts.Truncate = true
	db, err := badger.Open(opts)
	if err != nil {
		panic(err)
	}

	defer db.Close()

	// err = db.View(func(txn *badger.Txn) error {

	// 	item, err := txn.Get([]byte("marlon1"))
	// 	if err != nil {
	// 		panic(err)
	// 	}

	// 	var valNot, valCopy []byte
	// 	err = item.Value(func(val []byte) error {
	// 		// This func with val would only be called if item.Value encounters no error.

	// 		// Accessing val here is valid.
	// 		fmt.Printf("The answer is: %s\n", val)

	// 		// Copying or parsing val is valid.
	// 		valCopy = append([]byte{}, val...)

	// 		// Assigning val slice to another variable is NOT OK.
	// 		valNot = val // Do not do this.
	// 		return nil
	// 	})
	// 	if err != nil {
	// 		panic(err)
	// 	}

	// 	// DO NOT access val here. It is the most common cause of bugs.
	// 	fmt.Printf("NEVER do this. %s\n", valNot)

	// 	// You must copy it to use it outside item.Value(...).
	// 	fmt.Printf("The answer is: %s\n", valCopy)

	// 	// Alternatively, you could also use item.ValueCopy().
	// 	valCopy, err = item.ValueCopy(nil)
	// 	if err != nil {
	// 		panic(err)
	// 	}
	// 	fmt.Printf("The answer is: %s\n", valCopy)

	// 	return nil

	// })

	// if err != nil {
	// 	panic(err)
	// }

	txn := db.NewTransaction(true)
	err = txn.Set([]byte("marlon1"), []byte("marlon-value1"))
	if err != nil {
		panic(err)
	}
	err = txn.Commit()
	if err != nil {
		panic(err)
	}

}