How to Determine if a String is in JSON Format?

Determining JSON Format in Strings

Identifying whether a string conforms to JSON format is a common requirement in programming. This can be achieved using various techniques, such as parsing the string using libraries or regular expressions.

Solution Using JSON Library

One effective approach is to leverage the standard JSON library to verify the input string. The json.Unmarshal() function can be used for this purpose. Here's a sample implementation:

func IsJSON(str string) bool {
    var js json.RawMessage
    return json.Unmarshal([]byte(str), &js) == nil
}

In this function, we attempt to unmarshal the input string into a json.RawMessage type. If the unmarshaling is successful, it indicates that the string is in valid JSON format, and the function returns true.

This method is reliable and well-suited for validating JSON strings regardless of their specific schema. By leveraging the standard library, it's efficient and follows best practices for handling JSON data in Go.

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