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# Qt 3 Support Members for QLinkedList

The following class members are part of the Qt 3 support layer. They are provided to help you port old code to Qt 4. We advise against using them in new code.

- QLinkedList class reference

### Public Functions

- iterator find ( iterator from, const T & t )
- iterator find ( const T & t )
- const_iterator find ( const_iterator from, const T & t ) const
- const_iterator find ( const T & t ) const
- int findIndex ( const T & t ) const
- iterator remove ( iterator pos )

## Member Function Documentation

### iterator QLinkedList::find ( iterator from, const T & t )

If you need random access to a data structure then QList, QVector, QMap, or QHash, are all better choices than QLinkedList.

For example, if you have code like

        QLinkedList::iterator i = list->find(from, value);

you can rewrite it as

        QLinkedList::iterator i = from;
        while (i != list->end() && *i != value)
            ++i;

### iterator QLinkedList::find ( const T & t )

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

If you need random access to a data structure then QList, QVector, QMap, or QHash, are all better choices than QLinkedList.

For example, if you have code like

        QLinkedList::iterator i = list->find(value);

you can rewrite it as

        QLinkedList::iterator i = list->begin();
        while (i != list->end() && *i != value)
            ++i;

### const_iterator QLinkedList::find ( const_iterator from, const T & t ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

If you need random access to a data structure then QList, QVector, QMap, or QHash, are all better choices than QLinkedList.

For example, if you have code like

        QLinkedList::const_iterator i = list->find(from, value);

you can rewrite it as

        QLinkedList::const_iterator i = from;
        while (i != list->end() && *i != value)
            ++i;

### const_iterator QLinkedList::find ( const T & t ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

If you need random access to a data structure then QList, QVector, QMap, or QHash, are all better choices than QLinkedList.

For example, if you have code like

        QLinkedList::const_iterator i = list->find(value);

you can rewrite it as

        QLinkedList::const_iterator i = list->begin();
        while (i != list->end() && *i != value)
            ++i;

### int QLinkedList::findIndex ( const T & t ) const

If you need indexes then QList or QVector are better choices than QLinkedList.

For example, if you have code like

        int index = list->findIndex(value);

you can rewrite it as

        int index = 0;
        bool found = false;
        for (const_iterator i = list->begin(); i != list->end(); ++i; ++index)
            if (*i == value) {
                found = true;
                break;
            }
        if (!found)
            index = -1;

### iterator QLinkedList::remove ( iterator pos )

Use erase() instead.