How to convert a structure into Map in golang

In Golang, converting a structure into a Map is a common operation. Map is a data structure corresponding to key values, which facilitates us to query, delete, update and traverse data.

In this article, we will discuss how to convert a structure into a Map in Golang. The following are the detailed steps:

Step 1: Define a structure
First, we need to define a structure to store data. In this article, we will define a structure called Person to represent relevant information about a person, including name, age, and gender.

type Person struct {

Name  string
Age   int
Gender string

}

Step 2: Create an instance
Next, we need to create an instance of Person. Here we assume that we already have information about a person named tom.

tom := Person{Name: "Tom", Age: 18, Gender: "Male"}

Step 3: Create Map
Now we need to create a Map and add tom All information is stored in it. We can use the make() function to create a Map and specify the types of keys and values ​​in it.

personMap := make(map[string]interface{})

Step 4: Convert to Map
We need to convert tom’s information into Map for subsequent query and operation. We can use the reflect package, whose TypeOf() and ValueOf() methods can return the type and value of an instance.

import "reflect"

func StructToMap(obj interface{}) map[string]interface{} {

t := reflect.TypeOf(obj)
v := reflect.ValueOf(obj)
var data = make(map[string]interface{})
for i := 0; i < t.NumField(); i++ {
    data[t.Field(i).Name] = v.Field(i).Interface()
}
return data

}

In the above code , we defined a StructToMap function, using the reflect package to traverse the fields in the Person structure and insert it into the Map.

Step 5: Output the results
Now, we can use the fmt package to output the converted results.

personMap = StructToMap(tom)
fmt.Println(personMap)

The output result is:

map[Name:Tom Age:18 Gender:Male]

Summary
Converting a structure in Golang to a Map is an easy process. We only need to follow the above steps to complete the operation. In this process, we used the reflect package to obtain the type and value of the structure, and used the make() function to create a Map. Then, we use a for loop to insert the fields of the structure into the Map one by one. This process can be used for data conversion and processing in Golang.

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