how to make Lis<List> different length inside list

trying to make list inside list if

List<String> dataList = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10' , '11', '12', '13', '14', '15', '16', '17', '18' , '19', '20', '21', '22'];
List<int> dataListLength = [5 , 7, 10];
List<List<String>> listList = [];

try to show
listList[0] looks like [‘1’, ‘2’, ‘3’, ‘4’, ‘5’],
listList[1] looks like [‘6’, ‘7’, ‘8’, ‘9’, ’10’ , ’11’, ’12’],
listList[2] looks like [’13’, ’14’, ’15’, ’16’, ’17’, ’18’ , ’19’, ’20’, ’21’, ’22’]
like this????

>Solution :

Try this

List<String> dataList = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10' , '11', '12', '13', '14', '15', '16', '17', '18' , '19', '20', '21', '22'];
List<int> dataListLength = [5 , 7, 10];
List<List<String>> listList = [];
  int start = 0;
  for(var i in dataListLength){
    List<String> temp = [];
    for(int j=start; j<i+start; j++){
      temp.add(dataList[j]);
    }
    listList.add(temp);
    start = i;
  }
  print(listList);

result

[[1, 2, 3, 4, 5], [6, 7, 8, 9, 10, 11, 12], [8, 9, 10, 11, 12, 13, 14, 15, 16, 17]]