Golang: How To Convert JSON to Map in Go

Golang json is one of the most used packages. JSON(JavaScript Object Notation) parsing a day to activity for a developer. Most of the API which developer parse is in JSON. Here we will see how we can parse JSON Object to Map.

How To Convert JSON to Map in Golang

We will see how we can parse JSON Object and Array using Golang Interfaces. It reduces overhead to creating struct when data is unstructured, and we can parse the data and get the desired value from the JSON.

#go #golang #json

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What's new in the go 1.15

Go announced Go 1.15 version on 11 Aug 2020. Highlighted updates and features include Substantial improvements to the Go linker, Improved allocation for small objects at high core counts, X.509 CommonName deprecation, GOPROXY supports skipping proxies that return errors, New embedded tzdata package, Several Core Library improvements and more.

As Go promise for maintaining backward compatibility. After upgrading to the latest Go 1.15 version, almost all existing Golang applications or programs continue to compile and run as older Golang version.

#go #golang #go 1.15 #go features #go improvement #go package #go new features

Golang: How To Convert JSON to Map in Go

Golang json is one of the most used packages. JSON(JavaScript Object Notation) parsing a day to activity for a developer. Most of the API which developer parse is in JSON. Here we will see how we can parse JSON Object to Map.

How To Convert JSON to Map in Golang

We will see how we can parse JSON Object and Array using Golang Interfaces. It reduces overhead to creating struct when data is unstructured, and we can parse the data and get the desired value from the JSON.

#go #golang #json

Working with Golang Maps

Maps (also called dictionaries) are a very useful tool in helping to store and organize objects to be accessed in an efficient method. Most basic implementations of a map involve using a key to access a value in the map, resulting in key-value pairs, in which one key is associated with a specific value in the map. Within Go, maps follow this definition. This blog will cover the basic use cases of maps in Go, and how a newcomer to the language may utilize them for their applications.

Initialization

Initialization of a map can be done using the make command. This is similar to the initialization of a slice:

mapObject := make(map[string]string)

In this case, mapObject is a map that uses strings as a key to map to another string. When creating a map, the key type must be a type that is Comparable, or more specifically types that can be compared using the == operator. Examples of valid key types include booleans, numbers, strings and several other primitives can be used as keys. For reference on types, check out this link. One extra thing to note is that structs can be used as a key, provided that all the properties of the struct are Comparable.

#go #maps #golang #golang maps

Converting GoLang Structs to JSON

If you’re struggling with understanding how GoLang reads JSON you will need learn these tips to navigate quickly to be productive. Here are a few tips to use when working with JSON within the programming language Golang.

JSON-to-Go UnMarshal Function in Go?

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

var data = `
{
  "array": [
 1,
 2,
 3
  ],
  "boolean": true,
  "null": null,
  "number": 123,
  "object": {
 "a": "b",
 "c": "d",
 "e": "f"
  },
  "string": "Hello World"
}`
if err := json.Unmarshal([]byte(data), &Data); err != nil {      panic(err)   }

You’ll be able to print this GoLang (Go) Struct using the following code below.

fmt.Printf("%s", jsonMap)

#golang #golang-tutorial #programming #json #go

Golang Map Example | Maps in Go Tutorial Explained

Golang map is an inbuilt data type that has keys that are unique within the map while the values may or may not be the same. The map data structure in Golang is used for fast lookups, retrieval, and deletion of the data based on keys; that is why it is one of the most used data structures in computer science. Go map is an unordered collection of key-value pairs. They map keys to values.

Golang Map Example

One of the most useful data structures in computer science is the hash table. Many hash table implementations exist with varying properties, but in general, they offer fast lookups, adds, and deletes. Go provides a built-in map type that implements a hash table.

Go provides another essential data type named the map which maps unique keys to values. A key is an object that you use to retrieve the value at a later date. Given a key and a value, you can store the value in a Map object. After the value is stored, you can retrieve it by using its key.

There are also other data types available unlike maps for example  arrays,  structs, and  slice in Golang. Let’s start our Golang maps tutorial.

#golang #go #golang map