在Golang中将int数组转换为字节数组

Question

I'm trying to create some random int arrays and write it to a xyz.txt file in Golang.
How to convert ids which is an int array to byte array, as file.Write accepts []byte as a parameter. What is the correct way to achieve writing random integer arrays to a text file.

func main() {
    var id int
    var ids []int
    var count int

    f, err := os.Create("xyz.txt")
    check(err)

    defer f.Close()

    for j := 0; j < 5; j++ {
        count = rand.Intn(100)
        for i := 0; i < product_count; i++ {
            id = rand.Intn(1000)
            ids = append(product_ids, product_id)
        }
        n2, err := f.Write(ids)
        check(err)
        fmt.Printf("wrote %d bytes
", n2)
    }
}

Answer 1

You may use fmt.Fprint, as this simplified working sample:

package main

import (
    "bufio"
    "fmt"
    "math/rand"
    "os"
)

func main() {
    f, err := os.Create("xyz.txt")
    if err != nil {
        panic(err)
    }
    defer f.Close()
    w := bufio.NewWriter(f)
    defer w.Flush()

    for j := 0; j < 5; j++ {
        count := 4 //count := rand.Intn(100)
        for i := 0; i < count; i++ {
            fmt.Fprint(w, rand.Intn(1000), " ")
        }
        fmt.Fprintln(w)
    }
}

xyz.txt output file:

81 887 847 59 
81 318 425 540 
456 300 694 511 
162 89 728 274 
211 445 237 106