Delete multiple items with S|GJSON

main.go

package main

import (
	"fmt"
	"log"

	"github.com/tidwall/gjson"
	"github.com/tidwall/sjson"
)

var json = []byte(`
{
  "name": {"first": "Tom", "last": "Anderson"},
  "age":37,
  "children": ["Sara","Alex","Jack"],
  "fav.movie": "Deer Hunter",
  "friends": [
    {"first": "Dale", "last": "Murphy", "age": 44},
    {"first": "Roger", "last": "Craig", "age": 68},
    {"first": "Jane", "last": "Murphy", "age": 47}
  ]
}`)

func main() {
	n := int(gjson.GetBytes(json, "friends.#").Int())
	for i := 0; i < n; i++ {
		path := fmt.Sprintf("friends.%d.last", i)
		var err error
		json, err = sjson.DeleteBytes(json, path)
		if err != nil {
			log.Fatal(err)
		}
	}
	println(string(json))
}

Should output

{
  "name": {"first": "Tom", "last": "Anderson"},
  "age":37,
  "children": ["Sara","Alex","Jack"],
  "fav.movie": "Deer Hunter",
  "friends": [
    {"first": "Dale", "age": 44},
    {"first": "Roger", "age": 68},
    {"first": "Jane", "age": 47}
  ]
}

Came to pretty much the same conclusion -- thank you for looking into this!