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Utshaw/check for a key and insert if not exists

Created July 4, 2019 06:33
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check for a key and insert if not exists
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check for a key and insert if not exists
map<char, int> :: iterator iter = charFrequency.find(a);
if(iter == charFrequency.end() ){ // not found
charFrequency.insert({a, 1});
}else{ // found
iter->second = iter->second + 1;
}
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