How to convert interface{} to map

Question

I am trying to create a function that could accept following

*struct
[]*struct
map[string]*struct

Here struct could be any struct not just a sp

Answer 1

You don't need reflect here. Try:

v, ok := in.(map[string]*Book)
if !ok {
    // Can't assert, handle error.
}
for _, s := range v {
    fmt.Printf("Value: %v\n", s)
}

Same goes for the rest of your function. It looks like you're using reflection when you would be better served by a type switch.

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Alternatively, if you insist on using reflection here (which doesn't make a lot of sense) you can also use Value.MapKeys with the result from your ValueOf (see the answer https://stackoverflow.com/a/38186057/714501)