Last but not least, for debugging a value x, this gets you type and value
quickly:
fmt.Printf("type is %T and value is %#v\n", x, x)
On Monday, December 10, 2018 at 8:14:47 PM UTC-6, Mark Volkmann wrote:
>
> Here is some code that shows a part of what I'm trying to do.
> https://goplay.space/#8piYtjsqveZ
>
> package main
>
> import (
> "fmt"
> "reflect"
> )
>
> type Shape interface {
> Area() float64
> Rotate(angle float64)
> Translate(x, y float64)
> }
>
> func ReportInterface(intfPtr interface{}) {
> fmt.Println("type is", reflect.TypeOf(intfPtr)) // *main.Shape
> value := reflect.ValueOf(intfPtr)
> fmt.Println("value is", value) // <nil>
> fmt.Println("method count is", value.NumMethod()) // 0, Why not 3?
> }
>
> func main() {
> var ptr *Shape
> ReportInterface(ptr)
> }
>
>
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