capitalizar string nome capitalize

capitalize.dart

void main() {
  var result = capitalize('minha_string_Capitalizada_coRreTamenTE', pattern: '_', firstCap: false);
  print(result);
}

String capitalize(String value, {String? pattern, bool firstCap = false}) {
  var wordList = value.replaceAll(RegExp(' +'), pattern ?? ' ').split(pattern ?? " ");
  if (firstCap) {
    return wordList.map((str) => capitalizeAll(str)).join(pattern ?? " ").replaceAll(pattern ?? ' ', '');
  } else {
    var caps = wordList.sublist(1).map((str) => capitalizeAll(str)).join(pattern ?? " ");
    return '${wordList[0]}$caps'.replaceAll(pattern ?? ' ', '');
  }
  
}

String capitalizeAll(String value, {bool fixOtherLetters = false}) {
  if (fixOtherLetters){
    return value.length > 0 ?'${value[0].toUpperCase()}${value.substring(1).toLowerCase()}':'';
  } else {
    return value.length > 0 ?'${value[0].toUpperCase()}${value.substring(1)}':'';
  }
}