How to Safely Iterate Over a map[string]*Book After Converting from interface{}?

Converting interface{} to Map with Iteration

In your code, you encounter an error while attempting to convert interface{} to a map. To resolve this issue and enable iteration over map elements, follow these steps:

Use Assertions:

Replace the reflection-based approach with direct type assertions, as demonstrated in the code below:

func process(in interface{}, isSlice bool, isMap bool) {
    if isMap {
        v := in.(map[string]*Book)
        fmt.Printf("Type: %v\n", v)
        for _, s := range v {
            fmt.Printf("Value: %v\n", s)
        }
    }
}

This assertion assigns the interface{} value to a variable of type map[string]*Book if the condition is met. This approach is more efficient and does not require reflection.

Alternatively, you can use switch statements to handle different types of input without using reflection.

Use Custom Map Keys with Reflection (Optional):

If you still need to use reflection, you can retrieve map keys using Value.MapKeys instead of iterating directly over the value. See the Stack Overflow answer mentioned in the provided solution for details on this approach.

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