预先定义的Goint类型大小是特定于实现的，是32位还是64位（数字类型）。
这是将big-endian ints 转换为bytes（uint8s）的示例。
package main
import (
"encoding/binary"
"fmt"
"reflect"
)
func IntsToBytesBE(i []int) []byte {
intSize := int(reflect.TypeOf(i).Elem().Size())
b := make([]byte, intSize*len(i))
for n, s := range i {
switch intSize {
case 64 / 8:
binary.BigEndian.PutUint64(b[intSize*n:], uint64(s))
case 32 / 8:
binary.BigEndian.PutUint32(b[intSize*n:], uint32(s))
default:
panic("unreachable")
}
}
return b
}
func main() {
i := []int{0, 1, 2, 3}
fmt.Println("int size:", int(reflect.TypeOf(i[0]).Size()), "bytes")
fmt.Println("ints:", i)
fmt.Println("bytes:", IntsToBytesBE(i))
}
输出：
int size: 4 bytes
ints: [0 1 2 3]
bytes: [0 0 0 0 0 0 0 1 0 0 0 2 0 0 0 3]
要么
int size: 8 bytes
ints: [0 1 2 3]
bytes: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 3]
602392714
清零编程群