Append Interface Element Into Interface Golang

byMR

November 9, 2021

I have a function which accept all type of struct as interface. If I try to print

s.Index(i)

It gives me the values. However once I append it into

allRows []interface{}

and print it out. Instead of value I am getting the type of struct that I passed the function.
As an exapmle.

fmt.Println("AllRows",allRows)

[<adminPanel.allBeaconInfo Value> <adminPanel.allBeaconInfo Value>
<adminPanel.allBeaconInfo Value> <adminPanel.allBeaconInfo Value>
<adminPanel.allBeaconInfo Value>]

func pagination(c *gin.Context, st interface{})  {
            var allRows []interface{}
            switch reflect.TypeOf(st).Kind() {
            case reflect.Slice:
                s := reflect.ValueOf(st)
                for i := 0; i < s.Len(); i++ {
                    allRows=append(allRows,s.Index(i))
                    fmt.Println(allRows)
                }
            }
        
            fmt.Println("AllRows",allRows)

>Solution :

The expression s.Index(i) evaluates to a reflect.Value containing the actual slice element. Call Value.Interface() to get the actual slice element.

        var allRows []interface{}
        switch reflect.TypeOf(st).Kind() {
        case reflect.Slice:
            s := reflect.ValueOf(st)
            for i := 0; i < s.Len(); i++ {
                allRows=append(allRows,s.Index(i).Interface())
                fmt.Println(allRows)
            }
        }