Add header and Join 2 maps into ONE?

[Sibert]

I can only send ONE parameter into a Go template. But I have two (or more JSON) maps that I want to join and add a “header” into

The final outcome should be this. I want to add “main” and “sub” before each JSON.

const jsondata = `{
	"main": [{  <---------add main header
		"menu_id": "1",
		"menu_txt": "Home"
	}, {
		"menu_id": "2",
		"menu_txt": "Prefs"
	}],
	"sub": [{ <---------add sub header
		"menu_id": "3",
		"menu_txt": "Test"
	}, {
		"menu_id": "4",
		"menu_txt": "Test2"
	}]
}
`

The two JSON objects (maps?) are loaded separately and I want them to be joined.

func load_main(main string) []map[string]interface{} {
	resp, err := http.Get("https://api3.go4webdev.org/menu/" + main)
	if err != nil {
		fmt.Println("No response")
	}

	defer resp.Body.Close()
	menu, err := io.ReadAll(resp.Body)

	var data []map[string]interface{}
	if err := json.Unmarshal([]byte(menu), &data); err != nil {
		panic(err)
	}
	return data
}

func load_sub(sub string) []map[string]interface{} {
	resp, err := http.Get("https://api3.go4webdev.org/menu/" + sub)
	if err != nil {
		fmt.Println("No response")
	}

	defer resp.Body.Close()
	menu, err := io.ReadAll(resp.Body)

	var data []map[string]interface{}
	if err := json.Unmarshal([]byte(menu), &data); err != nil {
		panic(err)
	}
	return data
}

The output of each load is something like

[map[menu_id:home menu_txt:Home…] (main)
[map[menu_id:code menu_txt:Code…] (sub)

How do I add headers into each map and join the two JSON into ONE single JSON map?

Go Playground - The Go Programming Language

[Sibert]

@Sibert

I want them to be joined.

Finally I found one solution. Join them as strings and then map them.

func load_main(main string) string {
	resp, err := http.Get("https://api3.go4webdev.org/menu/" + main)
	if err != nil {
		fmt.Println("No response")
	}

	defer resp.Body.Close()
	menu, err := io.ReadAll(resp.Body)
	
	return string(menu)
}

func load_sub(sub string) string {
	resp, err := http.Get("https://api3.go4webdev.org/menu/" + sub)
	if err != nil {
		fmt.Println("No response")
	}

	defer resp.Body.Close()
	menu, err := io.ReadAll(resp.Body)

	return string(menu)
}

func load_menus(mainmenu string, submenu string) map[string]interface{} {
	main := load_main(mainmenu)
	sub := load_sub(submenu)
	menu := (`{ "main":` + string(main) + `,"sub":` + string(sub) + `}`)

	var data map[string]interface{}
	if err := json.Unmarshal([]byte(menu), &data); err != nil {
		panic(err)
	}
	return data
}