initializeDateFormatting function

Future initializeDateFormatting (String locale, String filePath)

This should be called for at least one locale before any date formatting methods are called. It sets up the lookup for date symbols using path. The path parameter should end with a directory separator appropriate for the platform.

Implementation 

Future initializeDateFormatting(String locale, String filePath) {
  var reader = new FileDataReader(path.join(filePath, 'symbols'));
  initializeDateSymbols(() => new LazyLocaleData(
      reader, _createDateSymbol, availableLocalesForDateFormatting));
  var reader2 = new FileDataReader(path.join(filePath, 'patterns'));
  initializeDatePatterns(() =>
      new LazyLocaleData(reader2, (x) => x, availableLocalesForDateFormatting));
  return initializeIndividualLocaleDateFormatting((symbols, patterns) {
    return Future.wait(
        <Future>[symbols.initLocale(locale), patterns.initLocale(locale)]);
  });
}