Containers

[Dmon]

What is the best container class to use for storing 3 instances of QLists? 3 derived classes from a base class that is implemented with the singleton design pattern, each creating a QList.

[Chris Kawa]

QList [3], std::tuple, QList, QVector...
Basically anything with constant access time. For 3 items it doesn't really matter unless you have some more specific requirements like memory constraint or binary layout etc.

[Dmon]

So you are saying I should store the QLists within a QList(3)? And you would access them by referring to the number? 1,2,3 or 0,1,2?

[Chris Kawa]

It's a plain C++ array. Like in most other places in C++ indices are 0-based
An example:
@
QList<QString> data[3]; //3 lists of strings
data[0] << "foo" << "bar"; //add "foo" and "bar" to first list
qDebug() << data[0][0]; //print first element of first list
@

[Dmon]

great thanks for the help.