Shuffle Array of Objects with Go Lang

cards-shuffle.go

package hello
 
import (
  "net/http"
  "github.com/go-martini/martini"
  "github.com/martini-contrib/cors"
  "github.com/martini-contrib/render"
  "math/rand"
)
 
 type Resources struct {
	Name  string `json:"name"`
	URI  string `json:"uri"`
	Methods  string `json:"methods"`
 }

 type Card struct {
	Suit  string `json:"suit"`
	Number int `json:"number"`
 }

//deck
var cards = []Card{{Suit: "Spades", Number: 2},{Suit: "Spades", Number: 3},{Suit: "Spades", Number: 4},{Suit: "Spades", Number: 5},{Suit: "Spades", Number: 6},{Suit: "Spades", Number: 7},{Suit: "Spades", Number: 8},{Suit: "Spades", Number: 9},{Suit: "Spades", Number: 10},{Suit: "Spades", Number: 11},{Suit: "Spades", Number: 12},{Suit: "Spades", Number: 13},{Suit: "Spades", Number: 14},{Suit: "Hearts", Number: 2},{Suit: "Hearts", Number: 3},{Suit: "Hearts", Number: 4},{Suit: "Hearts", Number: 5},{Suit: "Hearts", Number: 6},{Suit: "Hearts", Number: 7},{Suit: "Hearts", Number: 8},{Suit: "Hearts", Number: 9},{Suit: "Hearts", Number: 10},{Suit: "Hearts", Number: 11},{Suit: "Hearts", Number: 12},{Suit: "Hearts", Number: 13},{Suit: "Hearts", Number: 14},{Suit: "Diamonds", Number: 2},{Suit: "Diamonds", Number: 3},{Suit: "Diamonds", Number: 4},{Suit: "Diamonds", Number: 5},{Suit: "Diamonds", Number: 6},{Suit: "Diamonds", Number: 7},{Suit: "Diamonds", Number: 8},{Suit: "Diamonds", Number: 9},{Suit: "Diamonds", Number: 10},{Suit: "Diamonds", Number: 11},{Suit: "Diamonds", Number: 12},{Suit: "Diamonds", Number: 13},{Suit: "Diamonds", Number: 14},{Suit: "Clubs", Number: 2},{Suit: "Clubs", Number: 3},{Suit: "Clubs", Number: 4},{Suit: "Clubs", Number: 5},{Suit: "Clubs", Number: 6},{Suit: "Clubs", Number: 7},{Suit: "Clubs", Number: 8},{Suit: "Clubs", Number: 9},{Suit: "Clubs", Number: 10},{Suit: "Clubs", Number: 11},{Suit: "Clubs", Number: 12},{Suit: "Clubs", Number: 13},{Suit: "Clubs", Number: 14}}

//shuffle
func Shuffle(slc []Card) {
    for i := 1; i < len(slc); i++ {
        r := rand.Intn(i + 1)
        if i != r {
            slc[r], slc[i] = slc[i], slc[r]
        }
    }
}


func init() {
  m := martini.Classic()
  
  allowCORSHandler := cors.Allow(&cors.Options{
	AllowOrigins:     []string{"*"},
	AllowMethods:     []string{"GET", "POST"},
	AllowHeaders:     []string{"Origin"},
  })
 
  m.Use(render.Renderer(render.Options{
    IndentJSON: true, // Output human readable JSON
  }))
 
  m.Get("/", allowCORSHandler, func(r render.Render) {
  	Shuffle(cards)
	json := []Resources{{Name: "cards", URI: "/cards/{players}", Methods: "GET"}}
	r.JSON(200, json)
  })

  m.Get("/cards", allowCORSHandler, func(r render.Render) {
  	Shuffle(cards)
	r.JSON(200, cards)
  })  
 
  http.Handle("/", m)
}