GroupBy multi key

Question 1

how to do group by multiple key based sum of the value.

Question 2

List<Object> myList;
// ... add items to myList
final groups = groupBy(myList, (e) => (e.property1 + e.property2));

Gabriel Costache · Answer · Thu Oct 14 2021 20:08:39 GMT+0800 (China Standard Time)

List<Object> myList;
// ... add items to myList
final groups = groupBy(myList, (e) => (e.property1 + e.property2));