code-simple

import 'dart:convert';
import 'dart:io';

// This Will extract data from JSON file and Create CSV file. 
// people.json DownloadLink : https://gist.githubusercontent.com/code-simple/dff6ec9eaa0816131d7273578f38c3e1/raw/6c8e8b9bb36003c2f3b9ca3cefc8a4bcfe2910eb/people.json
// new.csv DownloadLink : https://gist.githubusercontent.com/code-simple/7cae32a464f8a9995a6e510528edc576/raw/d31870b6dac5781ac4ee1d203e66334320bfec96/new.csv
void main() {
  
  // Read CSV [Simple CSV that has first row header, and data in next rows]
  List<Map<dynamic, dynamic>> readCSV(String fileName) {

code-simple

[
    {
        "id": 1,
        "firstname": "Emiline",
        "lastname": "Carville",
        "email": "ecarville0@discuz.net",
        "gender": "Genderfluid",
        "job": "Professor",
        "phone": "638-170-8548",
        "language": "Kazakh"

code-simple

// How to use For Loop in Nested Map

void main() {
var people  = {1: {'Name': 'John', 'Age': '27', 'Sex': 'Male'},
          2: {'Name': 'Marie', 'Age': '22', 'Sex': 'Female'}};

for(int i=1;i<=people.length;i++){
  print('\nPerson ID: ${i}');
  people[i].forEach((k,v)=>print('$k : $v'));
}