emojiFlag function

String emojiFlag(
  1. String countryCode
)

Returns the emoji flag for the given two-letter ISO 3166-1 countryCode.

Example: emojiFlag('US') → 🇺🇸

Implementation

String emojiFlag(String countryCode) {
  assert(countryCode.length == 2);
  final int firstLetter = countryCode.codeUnitAt(0) - 0x41 + 0x1F1E6;
  final int secondLetter = countryCode.codeUnitAt(1) - 0x41 + 0x1F1E6;
  return String.fromCharCode(firstLetter) + String.fromCharCode(secondLetter);
}