Pawan Kumar‎'s code sample to turn country id to flag emoji

code2CountryEmoji.dart

import 'package:flutter/material.dart';

const int flagOffset = 0x1F1E6;
const int asciiOffset = 0x41;

String codeToCountryEmoji(code) {
  final char1 = code.codeUnitAt(0) - asciiOffset + flagOffset;
  final char2 = code.codeUnitAt(1) - asciiOffset + flagOffset;
  return String.fromCharCode(char1) + String.fromCharCode(char2);
}

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

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: MyWidget(),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: Text(
        codeToCountryEmoji("IN"),
        style: TextStyle(fontSize: 100),
      ),
    );
  }
}