# convert method

Uint8List convert (String string, [ int start = 0, int end ])
inherited

Converts the String into a list of its code units.

If `start` and `end` are provided, only the substring `string.substring(start, end)` is used as input to the conversion.

## Implementation

    Uint8List convert(String string, [int start = 0, int end]) {
      var stringLength = string.length;
      end = RangeError.checkValidRange(start, end, stringLength);
      var length = end - start;
      var result = Uint8List(length);
      for (var i = 0; i < length; i++) {
        var codeUnit = string.codeUnitAt(start + i);
        if ((codeUnit & ~_subsetMask) != 0) {
          throw ArgumentError.value(
              string, "string", "Contains invalid characters.");
        }
        result[i] = codeUnit;
      }
      return result;
    }