Assign to struct field dynamically (type t does not support indexing)
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Jay Adams
May 21, 2021, 5:38:15 PM5/21/21
to golang-nuts
Greetings,
I need to be able to assign a value to a struct field where I specify the field name in a variable. After searching around I thought the following approach would work but I still get the "type does not support indexing" error. This example is simplified:
type item struct {
red bool
green bool
blue bool
}
func (i *item) setProperty (propName string, propValue bool) *item {
(*i)[propName] = propValue
return i
}
func main() {
item := &item{red: true, green: true}
item = item.setProperty("blue", true)
fmt.Println(item)
}
Is it possible to assign to struct fields where the field name is in a variable? Any suggestions on how I get that to work? Thank you.
Ian Lance Taylor
May 21, 2021, 5:47:42 PM5/21/21
to Jay Adams, golang-nuts
On Fri, May 21, 2021 at 2:38 PM Jay Adams <t208...@gmail.com> wrote:
>
> Is it possible to assign to struct fields where the field name is in a variable? Any suggestions on how I get that to work? Thank you.
In Go this is done using type reflection.
>
> Is it possible to assign to struct fields where the field name is in a variable? Any suggestions on how I get that to work? Thank you.
https://play.golang.org/p/7Wt8eczIeXO
Ian
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