This is example of Mapping vs using ListView.builder() in flutter

mapping-vs-listviewbuilder.dart

import 'package:flutter/material.dart';

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

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

List items = [
  {'1': 'bottle', '2': 'empty'},
  {'1': 'mouse', '2': 'empty'},
];

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: darkBlue,
      ),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(title: const Text('My App')),
        body: Center(
          child: BuilderWidget(),
//           child: MapWidget(),
        ),
      ),
    );
  }
}

class MapWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ListView(
      children: [
        ...items
            .map((e) => Row(
                    crossAxisAlignment: CrossAxisAlignment.center,
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: [
                      Text(e['1']),
                      Text(e['2']),
                    ]))
            .toList(),
      ],
    );
  }
}

class BuilderWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ListView.builder(
        itemCount: items.length,
        itemBuilder: (context, index) {
          return Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Text(items[index]['1']),
                Text(items[index]['2']),
              ]);
        });
  }
}