Dart combining elements in one number-CodePudding

I have a list containing few elements like this: [1, 1, 2, 2, 3, 3]. I want to combine these numbers into one number without summing them so I want the final number to be: 112233; Is there a way to do it

CodePudding user response：

you can use reduce method from list

List<int> list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
  String s = "";
  for(int i in list) {
    s  = i.toString();
  }
int result = int.parse(s); //result = 12345678910

result maximum value is 2^63-1, otherwise you will get an overflow!!!

CodePudding user response：

This can be easily done with Iterable.fold or Iterable.reduce. In your case, since the element types and the result type are the same, you can use reduce:

void main() {
  var digits = [1, 1, 2, 2, 3, 3];
  var combined =
      digits.reduce((resultSoFar, current) => resultSoFar * 10   current);
  print(combined); // Prints: 112233
}