go go/book/learninggo

A Complete Guide to JSON in Golang (With Examples)
A Comprehensive Guide to Using JSON in Go | Better Stack Community
A Complete Guide to JSON in Golang

Intro

Marshalling: The act of converting a Go data structure into valid JSON
Unmarshalling: The act of parsing a valid JSON string into a data structure in go.

Attention

In other Languages, marshalling is often referred to as “serializing”, while unmarshalling is referred to as “deserializing”.

---
title: Marshalling and Unmarshalling in GO
---
flowchart LR
	A[JSON]
	B[Go Data Structure]

	A -- Unmarshalling --> B
	B -- Marshallling --> A

func main() {
    input := `{
        "name": "John Doe",
        "age": 15,
        "hobbies": ["climbing", "cycling", "running"]
    }`
 
    var target map[string]any
 
    err := json.Unmarshal([]byte(input), &target)
    if err != nil {
        log.Fatalf("Unable to marshal JSON due to %s", err)
    }
 
    for k, v := range target {
        fmt.Printf("k: %s, v: %v\n", k, v)
    }
}

The map[string]any data type in Go is a Go - Generic Container that can hold values of any type, including complex nested structures.