asExponential method

String asExponential(
  1. int precision, {
  2. bool removeTrailingZeros = true,
})

Implementation

String asExponential(int precision, {bool removeTrailingZeros = true}) {
  int offset = _decimal - _exponent;
  int extraZeroes = precision - (_digits.length - offset) + 1;
  if (extraZeroes > 0) {
    _digits.addAll(
        Formatter.getPadding(extraZeroes, '0').split('').map(int.parse));
  }
  _round(offset + precision, offset);
  String ret = _digits[offset - 1].toString();
  List<int> trailingDigits = _digits.sublist(offset, offset + precision);
  String _expStr = _exponent.abs().toString();
  if (_exponent < 10 && _exponent > -10) {
    _expStr = "0$_expStr";
  }
  _expStr = (_exponent < 0) ? "e-$_expStr" : "e+$_expStr";
  if (removeTrailingZeros) {
    trailingDigits = _removeTrailingZeros(trailingDigits);
  }
  if (trailingDigits.length > 0) {
    ret += '.';
  }
  ret = trailingDigits.fold(ret, (i, e) => "$i$e");
  ret = "$ret$_expStr";
  return ret;
}