Example on how to add items to a list based on struct

append_list.go

package main

import "fmt"

type SiteList struct {
 Title       string
 Address     string
 FeedAddress string
 Author      string
}

var list = []SiteList{}

func main() {
 list = append(list, SiteList{"Blog",
   "https://blog.example.com",
   "https://blog.example.com/feed/",
   "John Doe",
 })

 fmt.Printf("%v\n", list)
}

by_pointer.go

package main

import "fmt"

type SiteList struct {
 Title       string
 Address     string
 FeedAddress string
 Author      string
}

func fnc(list *[]SiteList) {
 *list = append(*list, SiteList{"Blog",
   "https://blog.example.com",
   "https://blog.example.com/feed/",
   "John Doe"})

 fmt.Printf("list: %v\n", list)
}

func main() {
 list := []SiteList{}
 fnc(&list)
 fmt.Printf("%v\n", list)
}

with_map.go

package main

import (
 "fmt"
 "time"
)

type SiteList struct {
 Title       string
 Address     string
 FeedAddress string
 Author      string
}

func fnc(list *[]SiteList) {
 *list = append(*list, SiteList{"Blog",
   "https://blog.example.com",
   "https://blog.example.com/feed/",
   "John Doe"})

 fmt.Printf("list: %v\n", list)
}

func main() {
 list := map[time.Time][]SiteList{}
 current := time.Now()
 site := list[current]
 fnc(&site)
 list[current] = site
 fmt.Printf("%v\n", list)
}