Re: [go-nuts] Struct confusion... what am I missing?
jake6502 is correct - the result is a slice that needs to be indexed
(you might use jsonvals[2].Int()).
I'd suggest that instead of using that gjson package, you might
consider using the
standard library's encoding/json package, which enables you to define
a struct type
that mimics the expected JSON; something like this:
https://play.golang.org/p/uodaEwbjDZR
This is nice because the json package takes care of a lot of
validation before you
need to look at the data.
On 12 March 2018 at 15:42, wrote:
> Go Noob here, confused about struct. My result is type []gjson.Result but I
> can't extract a named value from this struct. Help greatly appreciated, I
> have tried several articles.
>
> package main
>
> import (
>"fmt"
>"github.com/tidwall/gjson"
>"reflect"
> )
>
>
> func main() {
>// JSON package gjson
>const json = `{"pass":true,"balance":180,"who":"f","ID":4231}]`
>
>jsonvals := gjson.GetMany(string(json), "pass", "balance", "ID")
>fmt.Printf("%+v\n", jsonvals) // result: [true 180 4231]
>fmt.Println(reflect.TypeOf(jsonvals)) // result: []gjson.Result
>fmt.Printf("\n%+v\n", jsonvals.ID) // fails here, why? it is a struct,
> right???
>
> }
>
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Re: [go-nuts] Struct confusion... what am I missing?
jake6502 is correct - the result is a slice that needs to be indexed
(you might use jsonvals[2].Int()).
I'd suggest that instead of using that gjson package, you might
consider using the
standard library's encoding/json package, which enables you to define
a struct type
that mimics the expected JSON; something like this:
https://play.golang.org/p/uodaEwbjDZR
This is nice because the json package takes care of a lot of
validation before you
need to look at the data.
On 12 March 2018 at 15:42, wrote:
> Go Noob here, confused about struct. My result is type []gjson.Result but I
> can't extract a named value from this struct. Help greatly appreciated, I
> have tried several articles.
>
> package main
>
> import (
>"fmt"
>"github.com/tidwall/gjson"
>"reflect"
> )
>
>
> func main() {
>// JSON package gjson
>const json = `{"pass":true,"balance":180,"who":"f","ID":4231}]`
>
>jsonvals := gjson.GetMany(string(json), "pass", "balance", "ID")
>fmt.Printf("%+v\n", jsonvals) // result: [true 180 4231]
>fmt.Println(reflect.TypeOf(jsonvals)) // result: []gjson.Result
>fmt.Printf("\n%+v\n", jsonvals.ID) // fails here, why? it is a struct,
> right???
>
> }
>
> --
> You received this message because you are subscribed to the Google Groups
> "golang-nuts" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to golang-nuts+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
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[go-nuts] Struct confusion... what am I missing?
Go Noob here, confused about struct. My result is type []gjson.Result but I
can't extract a named value from this struct. Help greatly appreciated, I
have tried several articles.
package main
import (
"fmt"
"github.com/tidwall/gjson"
"reflect"
)
func main() {
// JSON package gjson
const json = `{"pass":true,"balance":180,"who":"f","ID":4231}]`
jsonvals := gjson.GetMany(string(json), "pass", "balance", "ID")
fmt.Printf("%+v\n", jsonvals) // result: [true 180 4231]
fmt.Println(reflect.TypeOf(jsonvals)) // result: []gjson.Result
fmt.Printf("\n%+v\n", jsonvals.ID) // fails here, why? it is a struct,
right???
}
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