无法将对象解组为[] uint8类型的Go值

Question

I am fairly new to Go. I have the following code:

package main

import (
    "encoding/json"
    "fmt"
)
func main() {

    byt := []byte(`{"num":6.13,"strs":["a","b"]}`)
    dat := []byte(`{"num":7.13,"strs":["c","d"]}`)
    if err := json.Unmarshal(byt, &dat); err != nil {
        panic(err)
    }
    fmt.Println(dat)

}

Getting the error:

cannot "unmarshal object into Go value of type []uint8".

How can I fix this please?

Answer 1

You have 2 JSON inputs, and you're trying to unmarshal one into the other. That doesn't make any sense.

Model your JSON input (the object) with a type (struct), and unmarshal into that. For example:

type Obj struct {
    Num  float64  `json:"num"`
    Strs []string `json:"strs"`
}

func main() {
    byt := []byte(`{"num":6.13,"strs":["a","b"]}`)

    var obj Obj
    if err := json.Unmarshal(byt, &obj); err != nil {
        panic(err)
    }
    fmt.Println(obj)

}

Output (try it on the Go Playground):

{6.13 [a b]}