Nested boost::unordered_map does not update the value?
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29-10-2019 - |
Question
The Code:
boost::unordered_map<int, boost::unordered_map<int, float>> map;
{
boost::unordered_map<int, float> h;
h.insert(make_pair(1, 0.5));
map.insert(make_pair(5, h));
}
{
boost::unordered_map<int, float> h = map[5];
h.insert(make_pair(2, 0.6));
map.insert(make_pair(5, h));
}
cout << map[5].size() << endl;
Why the output is 1 not 2? And when i use boost::unordered_map* > instead, then everything works well. Can anyone help me?
No correct solution
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