Count elements inside a json array in go

Question

I have following example json:

{
    "someObjects": [
    {
        "value1": "something here"
    },
    {
        "value1": "something else"
    }
    ]
}

I want to count the amount of objects inside the "someObjects" array in golang without using any lib.

The json is there in a string and I do not have the corresponding struct lying around (since it is actually pretty big). How can I count this?

Without any lib? Go is not like JavaScript, it doesn't have native JSON support. If you don't want to use libs you'll have to parse the JSON yourself. — mkopriva
– mkopriva, Commented Sep 22, 2023 at 16:59
This is done by a bit of programming. What have you tried? Where did you get stuck? Why?. Note that the Go stdlib has tools to unmarshal JSON. Using a clever adhoc data structure might be a sensible first approach in which case this is some 20 lines of simple code. — Volker
– Volker, Commented Sep 22, 2023 at 17:51
you can use the reflection standard package. Try to read more about it in this link this package lets you to manipulate objects with the arbitrary type interface{} (in recents versions now is called any type). Remember an important thing, golang is a strictly static typed language so the most easy way to do this is over an struct created by yourself and pass it to any of the functions in the json package that lets you unmarshal json's in structs — otaxhu
– otaxhu, Commented Sep 22, 2023 at 23:08
Does this answer your question? golang json unmarshal part of map[string]interface{} — ABDULLOKH MUKHAMMADJONOV
– ABDULLOKH MUKHAMMADJONOV, Commented Sep 23, 2023 at 16:42

taccb · Accepted Answer · 2023-09-23 17:00:33Z

0

Not even standard library ? Then you have to parse whatever coming from the network yourself which you can do using reflections in Go. But even in that case you have to use "reflect" package.

answered Sep 23, 2023 at 17:00

taccb

11 bronze badge

Sign up to request clarification or add additional context in comments.

2 Comments

Annabett Over a year ago

Of course I meant the standard lib is fine. Im sorry.

Community Over a year ago

Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.

Collectives™ on Stack Overflow

Count elements inside a json array in go

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related