Sorting and searching of words

main.dart

import 'dart:io';

import 'package:board_generator_playground/board_generator_playground.dart';
import 'package:csv/csv.dart';

void main() {
  final fileString = File('words.csv').readAsStringSync();
  final rows = const CsvToListConverter().convert(fileString);

  final wordsList = rows.map((row) {
    return (row[0] as String).replaceAll(' ', '').trim().toLowerCase();
  }).toList()
    ..removeWhere((element) => !RegExp(r'^[a-zA-Z]*$').hasMatch(element));

  final watch = Stopwatch()..start();
  final sortedWords = sortWords(wordsList);

  print('Sorted list in ${watch.elapsedMicroseconds} Microseconds\n');

  watch
    ..reset()
    ..start();
  print('Searching with sorted list');
  print(
    'Find a word 10 characters with second character e: '
    '${sortedWords[10]?[1]?['e']?.first}',
  );
  print(
    'Find a word 8 characters with second character e: '
    '${sortedWords[8]?[1]?['e']?.first}',
  );
  print(
    'Find a word 6 characters with second character e: '
    '${sortedWords[6]?[1]?['e']?.first}',
  );
  print(
    'Find a word 12 characters with second character e: '
    '${sortedWords[12]?[1]?['e']?.first}',
  );
  print(
    'Find a word 16 characters with second character e: '
    '${sortedWords[16]?[1]?['e']?.first}',
  );
  print('Executed in ${watch.elapsedMicroseconds} Microseconds\n');

  watch
    ..reset()
    ..start();
  print('Searching with list of words');
  print(
    'Find a word 10 characters with second character e: '
    '${wordsList.firstWhere((word) => word.length == 10 && word[1] == 'e')}',
  );
  print(
    'Find a word 8 characters with second character e: '
    '${wordsList.firstWhere((word) => word.length == 8 && word[1] == 'e')}',
  );
  print(
    'Find a word 6 characters with second character e: '
    '${wordsList.firstWhere((word) => word.length == 6 && word[1] == 'e')}',
  );
  print(
    'Find a word 12 characters with second character e: '
    '${wordsList.firstWhere((word) => word.length == 12 && word[1] == 'e')}',
  );
  print(
    'Find a word 16 characters with second character e: '
    '${wordsList.firstWhere((word) => word.length == 16 && word[1] == 'e')}',
  );
  print('Executed in ${watch.elapsedMicroseconds} Microseconds');
}