Dart: Scalable Application Development

Strings and Unicode

Dart Strings are immutable sequences of UTF-16 code units. UTF-16 combines surrogate pairs, and if you decode these, you get Unicode code points. Unicode terminology is terse, but Dart does a good job of exposing the different parts.

How to do it...

We will see the different methods to perform action on strings with special characters in unicode.dart:

String country = "Egypt";
String city = "Zürich";
String japanese = "日本語"; // nihongo meaning 'Japanese'

void main() {
  print('Unicode escapes: \uFE18'); //  the ⎕ symbol
  print(country[0]);                 // E
  print(country.codeUnitAt(0));      // 69
  print(country.codeUnits);          // [69, 103, 121, 112, 116]
  print(country.runes.toList());     // [69, 103, 121, 112, 116]
 print(new String.fromCharCode(69)); ...