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Marshal JSON

If there is a way to unmarshal JSON data, there must be a way to marshal it as well. The json.Marshal function converts a Go struct into a slice of bytes representing JSON data.

Example

type Board struct {
	Id       int    `json:"id"`
	Name     string `json:"name"`
	TeamId   int    `json:"team"`
	TeamName string `json:"team_name"`
}

board := Board{
	Id:       1,
	Name:     "API",
	TeamId:   9001,
	TeamName: "Backend",
}

data, err := json.Marshal(board)
if err != nil {
	log.Fatal(err)
}
fmt.Println(string(data))
// {"id":1,"name":"API","team":9001,"team_name":"Backend"}

Assignment

Complete the marshalAll function. It accepts a slice of "items", which can be of any type. The expectation is that they are structs of various forms. It should return a slice of slices of bytes (I didn't stutter) [][]byte.

Create a slice of bytes slices to hold the marshalled data.
For each item in items:
1. Marshal the item into a slice of bytes.
2. If an item cannot be marshaled, immediately return a nil slice and the error.
3. Add the marshalled JSON byte slice to the slice of bytes slices.
Return the marshalled data in the same order as the input items.