A script to generate a big CSV file with dummy data.

generate_big_csv_file.dart

import 'dart:io';
import 'dart:math';

void main() {
  final titles = List.generate(12, (i) => '$i');

  // Generate data
  final data = [
    titles,
    for (int i = 0; i < 200000; i++)
      List.generate(titles.length, (_) => generateRandomString(20))
  ];

  // Write to csv file
  File('big_csv_file.csv')
      .writeAsStringSync(data.map((row) => row.join(',')).join('\n'));
}

String generateRandomString(int len) {
  return String.fromCharCodes(
      List.generate(len, (index) => Random().nextInt(33) + 89));
}