Sample code for "Top 10 String utility methods you should know (Dart) 🎯" (Complete solution)

top_10_string_utilities.dart

void main() async {
  var str1 = 'Lorem';
  var str2 = '$str1 ipsum'; // String interpolation
  var str3 = '''Multi
Line
$str1 $str2'''; // Multi line string
  
  print(str1.contains('rem')); // true
  
  print(str2.startsWith('Lorem')); // true
  print(str3.startsWith('Noorem')); // false
  
  print(str3.endsWith('ipsum')); // true
  print(str3.endsWith(r'$str2')); // false
  
  print(str1.toLowerCase()); // lorem
  print(str1.toUpperCase()); // LOREM
  
  print(str3.split('\n')); // ['Multi', 'Line', 'Lorem Lorem ipsum']
  
  print(str3.splitMapJoin(RegExp(r'^', multiLine: true), // Matches the beginning of each line
    onMatch: (m) => '**${m.group(0)} ', // Adds asterisk to the line beginning
    onNonMatch: (n) => n)); // Leaves non-matches as is
  
  print(str3.indexOf('rem')); // 4
  print(str3.lastIndexOf('rem')); // 19
  print(str3.lastIndexOf('rem', 18)); // 13
  
  print('  $str2  '.trim()); // 'Lorem ipsum'
  
  print(str1.padLeft(8, 'x')); // xxLorem
  print(str1.padRight(8, 'x')); // Loremxx
  
  print(str1.replaceAll('e', 'é')); // Lorém
}