Why is the key 0

[vaecou]

func TestParseJSON(t *testing.T) { str :=[
{"drawNumber":"51117487"},
{"drawNumber":"51117486"},
{"drawNumber":"51117485"},
{"drawNumber":"51117484"},
{"drawNumber":"51117483"},
{"drawNumber":"51117482"},
{"drawNumber":"51117481"},
{"drawNumber":"51117480"},
{"drawNumber":"51117479"},
{"drawNumber":"51117478"},
{"drawNumber":"51117477"},
{"drawNumber":"51117476"},
{"drawNumber":"51117475"},
{"drawNumber":"51117474"},
{"drawNumber":"51117473"},
{"drawNumber":"51117472"},
{"drawNumber":"51117471"},
{"drawNumber":"51117470"}
]gjson.Parse(str).ForEach(func(key, value gjson.Result) bool { fmt.Println("key", key.Int()) fmt.Println("key", value.Get("drawNumber").Int()) return true }) }

[tidwall]

The ForEach function loops over each entry in a JSON Object or Array. The key for an Object is the actual JSON key. For an Array it's the index of the value in the array.

For example:

package main

import (
	"fmt"

	"github.com/tidwall/gjson"
)

func main() {
	str := `[
	  {"drawNumber": "51117487"},
	  {"drawNumber": "51117486"},
	  {"drawNumber": "51117485"},
	  {"drawNumber": "51117484"},
	  {"drawNumber": "51117483"},
	  {"drawNumber": "51117482"}
	]`
	gjson.Parse(str).ForEach(func(key, value gjson.Result) bool {
		fmt.Println("key", key.Int())
		fmt.Println("key", value.Get("drawNumber").Int())
		return true
	})
}

key 0
key 51117487
key 1
key 51117486
key 2
key 51117485
key 3
key 51117484
key 4
key 51117483
key 5
key 51117482

https://go.dev/play/p/VZBrsvyWMfY

[vaecou]

该 ForEach 函数循环遍历 JSON 对象或数组中的每个条目。 key for an Object 是实际的 JSON 键。对于数组，它是数组中值的索引。

 例如：

package main

import (
	"fmt"

	"github.com/tidwall/gjson"
)

func main() {
	str := `[
	  {"drawNumber": "51117487"},
	  {"drawNumber": "51117486"},
	  {"drawNumber": "51117485"},
	  {"drawNumber": "51117484"},
	  {"drawNumber": "51117483"},
	  {"drawNumber": "51117482"}
	]`
	gjson.Parse(str).ForEach(func(key, value gjson.Result) bool {
		fmt.Println("key", key.Int())
		fmt.Println("key", value.Get("drawNumber").Int())
		return true
	})
}

key 0
key 51117487
key 1
key 51117486
key 2
key 51117485
key 3
key 51117484
key 4
key 51117483
key 5
key 51117482

https://go.dev/play/p/VZBrsvyWMfY

Very strange, I copied your code snippet for testing, but the result is still 0

[vaecou]

My current method is solved by self-increment. I don't know if this will cause any other problems, such as inaccurate sorting.

[pnikonowicz]

There is a test to verify that the key.Int() returns the index of the array element as explained by @tidwall (#361 (comment)). I have ran this test with sha 4d23028 and found the test to pass. Also, this playground link https://go.dev/play/p/VZBrsvyWMfY demonstrates that the key indexing works as expected.

I recommend that we mark this issue as "cannot reproduce" and / or close the issue since this appears to be working currently.