Tips to Consider with Inheritance in Object Oriented Programming

This video is an excerpt from my lecture: • Understanding Inherita...
You may have done some object-oriented programming and arrived to the concept of inheritance. In this clip, I discuss a few ideas to have in mind when designing a solution that takes advantage of inheritance in object-oriented programming.

[@shreyasdongre2537]

Hey so i have been a viewer of yours, i wanted to ask do u have any idea on how to display linked lists in qt widget application? like which widget to use pls help.. p.s: my comments are getting deleted for some reason. :(

[@VelcodeCS]

I think you are being flagged as spam. I saw your comment, and then it wasn't there any more. Try again, but don't put any links. A linked list is a list of items. You can display a list of items in various ways. A set of buttons. A combo box. It really depends on what behavior you want to achieve with that list.

[@shreyasdongre2537]

@@VelcodeCS oh ah yeah probably i am being flagged as spam. but yes i want to just display the linked list. probably in listWidget? i just want to like print all the nodes of linked list. can u like give a fair idea or just a dummy skeleton code on how to approach this? Edit: ik you mean to say that i can use other stuff but my task itself is to use link list. so i cant use anything else. i have to display the link list. you can see my basic code at cppdotsh/3kxye put. instead of dot.

[@VelcodeCS]

@@shreyasdongre2537 Well, what is your linked list made out of? Integers? Strings? Custom-made objects? You have a list of items which you want to display, so the end result is going to be some simple string. You can use a QListWidget, as you suggested, or a QTableWidget (with one column). Either way, you will have to traverse your list and append the item (whatever the node of data represents) to the widget for display. If you look at the QListWidget documentation, it has an insertItem function which you can use per node in your list. Does that make sense?

[@shreyasdongre2537]

@@VelcodeCS it has string and integers as member variables.. I tried Qlist widget it appends the dara. before appending I did convert the data into QString. but I can't see the data. For some reason. It shows blank. And btw how should I traverse through my link list? in normal c++ I use while loop with condition pointer not equal to null. In qt that kind of traversal doesn't work for some reason idk why. It crashes..

[@VelcodeCS]

A QList has members to know how many elements are in the list. Instead of check for null, iterate through all the elements (use count function). You just simply grab the item you need using the same notation as with arrays, where the loop iteration index is used as the list item position index. Ultimately, the point of using something like a QList instead of your own custom made linked list is to benefit from all the functionality that already exists. You shouldn't need to do any pointer work to access the elements.