how to get a pointer of element's value in a double-linked list (go-lang) -

i want modify element's value in double-linked list, don't know how pointer, because element's value nil interface defined go-lang itself. far know is, must type assertion before element's value like:

val, ok := ele.value.(type) if ok {     // something... } 

but if modify val useless. hint?

thanks.

there 2 pretty straight forward options. they're going involve type asserting because you're using interface{}

you can store pointer , type assert:

var q interface{} var int q = &i *(q.(*int)) = 5 

you can reassign it:

var q interface{} q = 5 b := q.(int) q = 2*b 

i think reassigning makes sense. if you're doing in function need return new value. i'm sure there other ways change around, think simple best.

of course in real work checking nice.