decrypt static method

String decrypt(
  1. String encryptedStr
)

Implementation

static String decrypt(String encryptedStr) {
  String sb = encryptedStr;
  String str = '';

  for (int i = 0; i < sb.length; i++) {
    if ((i + 1) % 2 == 0) {
      str = "$str${sb[i]}";
    }
  }

  return str.toString().split('').reversed.join();
}