Pavneet-Sing

import React, { Component } from "react";
import "./style.css";

export default class App extends Component {
  state = {
    cart: ["Corn", "Potato"],
  };

  addNewItem = () => {
    this.setState((prevState) => ({

Pavneet-Sing

<person version="1.0" encoding="utf-8">
  <fname>Pavneet</fname>
  <lname>Singh</lname>
  <contacts>
    <personal>
      <phone>12345678900</phone>
    </personal>
  </contacts>
</person>

Pavneet-Sing

<?xml version="1.0" encoding="utf-8"?>
<person>
  <fname>Pavneet</fname> <!--first name-->
  <lname>Singh</lname> <!--last name-->
  <contacts>
    <personal>
      <phone>12345678900</phone>
    </personal>
  </contacts>
</person>

Pavneet-Sing

{
    "userId": 1,
    "id": 1,
    "title": "sunt aut facere repellat provident occaecati excepturi optio reprehenderit",
    "body": "quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto"
  }

Pavneet-Sing

import 'dart:async';

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MaterialApp(
      theme: ThemeData.light().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,

Pavneet-Sing

// Person class with occupation as nullable property using ? 
data class Person(
    @JsonProperty("name") val name: String,
    @JsonProperty("occupation") val occupation: String? // nullable
)

Pavneet-Sing

// import com.fasterxml.jackson.module.kotlin.registerKotlinModule
// import com.fasterxml.jackson.databind.ObjectMapper

val mapper = ObjectMapper().registerKotlinModule()
println(mapper.readValue(dataJSONStr, Person::class.java))

Pavneet-Sing

// Simple kotlin class without data keyword
class Person{
    lateinit var name: String
    var occupation: String? = null
}

Pavneet-Sing

//JsonProperty to allow Jackson to use setters and getters
data class Person(
    @JsonProperty("name") val name: String,
    @JsonProperty("occupation") val occupation: String
)

Pavneet-Sing

data class Person(var name: String, var occupation: String)