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How to iterate on all values () in a QMultiHash
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How to iterate on all values () in a QMultiHash
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I need to iterate over a QMultiHash and examine the list of values that correspond to each key. I need to use a mutable iterator so I can delete items from the hash if they meet certain criteria. The documentation does not explain how to access all of the values, just the first one. Additionally, the API only offers a value() method. How do I get all of the values for a particular key?
This is what I'm trying to do:
QMutableHashIterator<Key, Value*> iter( _myMultiHash );
while( iter.hasNext() )
{
QList<Value*> list = iter.values(); // there is no values() method, only value()
foreach( Value *val, list )
{
// call iter.remove() if one of the values meets the criteria
}
}
May be better use recent documentation: http://doc.qt.io/qt-4.8/qmultihash.html
In particular:
QMultiHash<QString, int>::iterator i = hash1.find("plenty");
while (i != hash1.end() && i.key() == "plenty") {
std::cout << i.value() << std::endl;
++i;
}
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