go - Builtin func "append" in method for pointer receiver -

having 2 types:

type headers []headeritem  type headeritem struct { // 1 doesn't matter. other type   name  string   value string } 

i add function slice receiver. how can (pseudo-code):

func (h *headers) addheaderitem(item headeritem) {     h = &(append( *h, item )) } 

the compiler complains it, doesn't work.

i tried:

func (h headers) addheaderitem(item headeritem) {     h = append( h, item ) } 

this compiles doesn't want: when later on rangeing on items, empty result.

inside addheaderitem() method h pointer. not want change pointer pointed value:

func (h *headers) addheaderitem(item headeritem) {     *h = append(*h, item) } 

testing it:

h := headers{} fmt.println(h) h.addheaderitem(headeritem{"myname1", "myvalue1"}) fmt.println(h) h.addheaderitem(headeritem{"myname2", "myvalue2"}) fmt.println(h) 

output:

[] [{myname1 myvalue1}] [{myname1 myvalue1} {myname2 myvalue2}] 

try on go playground.