Dart Adding a new key value to map
Solution 1:
void main() {
var myMap = {'A': {'b':3}};
myMap['A']!['c'] = 3;
print(myMap);
}
Solution 2:
Assuming you started with:
var myMap = {'A': {'b': 3}};
You can update like this:
myMap['A'] = {
'b': 3,
'c': 3,
};