Combine/merge multiple maps into 1 map

March 11, 2023 by Tarik

you can use addAll method of Map object

var firstMap = {"1":"2"};
var secondMap = {"2":"3"};

var thirdMap = {};

thirdMap.addAll(firstMap);
thirdMap.addAll(secondMap);

print(thirdMap);

var thirdMap = {}..addAll(firstMap)..addAll(secondMap);

Update

Since dart sdk 2.3
You can use spread operator ...

final firstMap = {"1":"2"};
final secondMap = {"2":"3"};

final thirdMap = {
   ...firstMap,
   ...secondMap,
};