Pre-order tree traversal in 3 minutes

Step by step instructions showing how to do pre-order tree traversal on a binary tree.

[cugamer]

Finally, someone who explains algorithms and data structures using plain English instead of mathematical notation. Not all of us had the benefit of a four year CS education, you're doing a great service here.

[zachary]

Fun fact: if you apply pre-order traversal of a BST on the British royal family tree (ordered by age) this is how the crown is passed along.

[magscovers]

Dude you saved my life. You just explained a concept my data structures professor was trying to explain in a 2 hour video. He overloaded us with so much information that the important parts were incomprehensible.

[zinaright]

I want this guy for every concept I need to understand. Absolitely spot on, brief and concise

[snipo]

omg this was so simple yet so effective, thanku so much

[ludendorf]

Thank you so much for your efforts at beautifully explaining this and other algorithms. Subbed.

[drunkstudent]

For better understanding, you can add the final state as 'return' or 'done' in the checklist status (visit, left, right and return) to know which node is fully complete or if that node is still pending in the stack frame.

[matthewsmith]

This video and the other one you have on post-order tree traversal are absolute gold. Was so confused by how recursive functions work (especially with the return keyword), but this is definitely helping me piece it together :))

[ceasarmusk]

Holy shit visit left right actually makes so much sense

[RECTmetal]

Thank you for making a nice clean and straight forward explanation!

[neil_from_future]

Thank you! I have a test on all tree topics tomorrow, and this saved me from having to read through my professor's entire PDF lecture.

[kathipogudavidpaul]

Good explanation dear friend.... I helped me a lot 👍👍👍🙏🙏🙏thank you 💖😊

[anonanon]

Youtube now ai-translates titles and I hate it.

To translate the title that shows up to me back to english: "Pre-sale on trees. Order now in 3 minutes".

[udanamethmal]

Dude thanks a whole freaking lot for these 3 videos. Saved me a great amount of time

[bvwalker]

Very nice explanation. Thank you! Subbed!

[maremp]

I like your explanations, every single video was helpful. Could you make videos about drawing different trees, like AVL, Red-Black and B-Trees?

[ferengiprophet]

Thank you! You're an amazing teacher. You were able to take a complicated concept (at least to me) and able to explain it in plain terms.

[zboobafett]

Michael I just wanted to say I love you so so so much. I have seen this videos and many others videos and that helped me a lot in my student life. You're a genius !!!

[mladenkaorlic]

You should get salary instead of my teachers...

[manasabokka]

clarity, while you explain, is amazing, the way you strike visit, left, right to indicate the call stack is very helpful to imagine recursion.