Store a list of 64bit integers as a long slice of bytes in Go https://play.golang.org/p/XMQVJUgkZ9T

byte_slice_of_ints.go

package main

import (
	"crypto/rand"
	"encoding/binary"
	"fmt"
)

func main() {

	// The actual index is a N * 8 []byte long slice of values
	var index []byte

	var generatedIds []uint64

	for i := 0; i < 10; i++ {
		// Generate a bunch of random 64bit numbers (in []byte form)
		// id := rand.Int63()
		ib := make([]byte, 8)
		rand.Read(ib)

		id := binary.BigEndian.Uint64(ib)
		generatedIds = append(generatedIds, id)

		index = append(index, ib...)
	}

	fmt.Println("index", index)
	fmt.Println("generatedIds", generatedIds)

	var ids []uint64
	for i := 0; i < len(index); i += 8 {
		id := binary.BigEndian.Uint64(index[i : i+8])
		ids = append(ids, id)
	}

	fmt.Println("ids         ", ids)
}