在golang中的变量中解析Json

Question

how do I parse this json

[
  [
    [
      "Odio los lunes",
      "i hate mondays",
      null,
      null,
      1
    ]
  ],
  null,
  "en"
]

to show just Odio los lunes?

Answer 1

Implement unmarshalar to fetch the value required from nested array and parse it into and struct using unmarshal like:

package main

import (
    "fmt"
    "encoding/json"
)

func(item *Result) UnmarshalJSON(data []byte)error{
    var v []interface{}
    if err:= json.Unmarshal(data, &v);err!=nil{
        fmt.Println(err)
        return err
    }
    item.Data = v[0].(interface{}).([]interface{})[0].([]interface{})[0].(string)
    return nil
}

type Result struct {
    Data string
}

func main() {
    var result Result
    jsonString := []byte(`[[["Odio los lunes", "i hate mondays", null, null, 1]], null, "en"]`)
    if err := json.Unmarshal(jsonString, &result); err != nil{
        fmt.Println(err)
    }
    //fmt.Printf("%+v
",result)
    value := result.Data
    fmt.Println(value)
}

Playground example