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void main() { | |
Map<Calc, List<Calc>> map = {}; | |
Calc calc = new Calc(5); | |
Calc calc1 = new Calc(6); | |
Calc calc2 = new Calc(7); | |
calc.add(11, 12); | |
map[calc] = [calc1, calc2]; | |
map[calc][0].add(1, 2); | |
map[calc][1].add(6, 7); | |
print(map[calc][0].sum); | |
print(map[calc][1].sum); | |
print(calc.sum); | |
print(calc1.sum); | |
print(calc2.sum); | |
print(map.keys.toList()[0].sum); | |
} | |
class Calc { | |
int _sum; | |
Calc(_sum); | |
add(int a, int b) { | |
_sum = a + b; | |
} | |
get sum => _sum; | |
} |
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