[英]How to use Qmap inside a Qhash?
I have to create a QHash with a map QMap inside it, I have tried to write it as follows: 我必须在其中创建一个带有地图QMap的QHash,我试着按如下方式编写它:
Declaration: 宣言:
QMap<int,int>price_vol;
QHash<int,QMap<int,int>>table_maintain;
QList<int>data_list;
Definition: 定义:
price_vol.insertMulti(stOrderData->Price,stOrderData->Quantity);
table_maintain.insertMulti(stOrderData->TokenNo,price_vol);
data_list = table_maintain.values();
So I want to know: will I get a QMap
for a token number which will map to various values with 'price' as key? 所以我想知道:我是否会得到一个代号的QMap
,它会映射到以'price'为关键的各种值?
So I want to know: will I get a QMap for a token number which will map to various values with 'price' as key? 所以我想知道:我是否会得到一个代号的QMap,它会映射到以'price'为关键的各种值?
Yes, sure. 是的,当然。
How can i print all values of tablemaintain? 如何打印tablemaintain的所有值?
Just loop through the containers and print their keys and values as you wish; 只需循环容器并按照您的意愿打印其键和值; something like this: 这样的事情:
foreach (int key, myContainer.keys())
qDebug() << key << "," << myContainer.value(key);
will the values inside price_vol be sorted by itself? price_vol里面的值会自行排序吗?
Sure, that is the main difference between QMap
and QHash
. 当然,这是QMap
和QHash
之间的主要区别。 QMap
will be ordered based on the key. QMap
将根据密钥进行排序。
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