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Jidong Xiao
2023-10-20 10:45:08 -04:00
parent 894df9ff7f
commit 8e5b08b680
1 changed files with 3 additions and 1 deletions
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lectures/15_maps_I/README.md
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@@ -147,8 +147,10 @@ m.insert(std::make_pair(key, value));
insert returns a pair, but not the pair we might expect. Instead it is pair of a map iterator and a bool: insert returns a pair, but not the pair we might expect. Instead it is pair of a map iterator and a bool:
std::pair<map<key_type, value_type>::iterator, bool> std::pair<map<key_type, value_type>::iterator, bool>
- The insert function checks to see if the key being inserted is already in the map. - The insert function checks to see if the key being inserted is already in the map.
– If so, it does not change the value, and returns a (new) pair containing an iterator referring to the existing – If so, it does not change the value, and returns a (new) pair containing an iterator referring to the existing
pair in the map and the bool value false. pair in the map and the bool value false.
– If not, it enters the pair in the map, and returns a (new) pair containing an iterator referring to the newly – If not, it enters the pair in the map, and returns a (new) pair containing an iterator referring to the newly
added pair in the map and the bool value true. added pair in the map and the bool value true.