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Date: 2015apr24 Language: C++ Q. What happens when a key is missing from a std::map<> ? A. It makes an empty entry then gives that to you. If we have:std::map<std::string, std::string> fruit; fruit["apple"] = "red"; fruit["bannana"] = "yellow";Then we try to get:std::string c = fruit["orange"];String c will be "". Since its been added to the map. Note this as changed fruit.size() You can use fruit.find("orange") to see if a key is present.
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