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| type T struct { | |
| A int | |
| B string | |
| } | |
| t := T{23, "skidoo"} | |
| s := reflect.ValueOf(&t).Elem() | |
| typeOfT := s.Type() | |
| for i := 0; i < s.NumField(); i++ { | |
| f := s.Field(i) | |
| fmt.Printf("%d: %s %s = %v\n", i, | |
| typeOfT.Field(i).Name, f.Type(), f.Interface()) | |
| } | |
| // The output of this program is | |
| // | |
| // 0: A int = 23 | |
| // 1: B string = skidoo |
thank you :)
panic: reflect: call of reflect.Value.NumField on interface Value
It gives me this error.
My struct is defined as :
type bundle struct {
valnode *Node
tree *tree
}
awesome guy!
Excellent - Clean, succinct
Spent several hours before finding this Thanks
f.Interface undefined..
@xgz123 you're probably calling reflect.TypeOf(struct) rather than reflect.ValueOf(struct). Calling Field(i) on a Type returns a StructField which doesn't have the Interface method. Calling reflect.ValueOf(struct).Field(i) returns a Value which does have the Interface method.
f.Interface() only works for the struct type which has public fields.
This code worked.
v := reflect.ValueOf(structValue)
t := v.Type()
for i := 0; i < t.NumField(); i++ {
name := t.Field(i).Name
value := v.FieldByName(name).Interface()
}
@mrdulin just put in a guard to check f.PkgPath, since it's only populated for unexported fields, f.PkgPath == "" will only be true for exported fields, so you can avoid panics when trying to process unexported fields.
well played, thank you :)