How Can I Assign Multiple Data Types (String and Integer) to a Go Map for JSON Marshaling?

Assigning Multiple Types to Strings for JSON Objects

Q: Seeking a method to construct a map that translates to a JSON object with both string and integer values, such as:

{
   "a": "apple",
   "b": 2
}

However, Go mandates type-specified maps, leaving developers with options like map[string]string or map[string]int.

A: Utilize Go's interface{} type to store arbitrary data types. As documented in the encoding/json package:

When JSON unmarshals into an interface value, it stores appropriate concrete types based on the JSON content:

- bool for booleans
- float64 for numbers
- string for strings
- []interface{} for arrays
- map[string]interface{} for objects
- nil for null

To implement this solution:

m := map[string]interface{}{"a":"apple", "b":2}

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