capitalize first letter of string and first letter after dot

Question

I have this string for example:

String text = 'hello. i am Gabriele. i am 21 years old!';

I would like the first letter to be capitalized and every first letter after the "." To be capitalized.

Anyone know how I can do? Thanks :)

Answer 1

The first letter and all the first letters after the dot will be uppercase.

void main() {
  String text = 'hello. i am Gabriele. i am 21 years old!';
  String capitalized = capitalizeAfterDot(text);

  print(capitalized); // Hello. I am Gabriele. I am 21 years old!
}

String capitalizeAfterDot(String text) {
  final split = text.replaceAll(RegExp(r'\.\s+'), ' #').split(' ');
  String result = split.reduce((a, b) {
    if (b.startsWith('#')) {
      return a + b.replaceRange(0, 2, '. ' + b[1].toUpperCase());
    }
    return a + ' ' + b;
  });

  return result.replaceRange(0, 1, result[0].toUpperCase());
}

OR

String capitalizeAll(String text) {
  return text.replaceAllMapped(RegExp(r'\.\s+[a-z]|^[a-z]'), (m) {
    final String match = m[0] ?? '';
    return match.toUpperCase();
  });
}