[Discrete Mathematics] Tree Directories and Traversals

[@joelbny]

I love that little Flag trick! So helpful, esp for in-order traversal, which Grimaldi explains very cryptically. I don't know why Grimaldi doesn't mention the flag trick, sometimes I think he likes his textbook to be opaque...

[@megadevX]

My professor took forever to explain this and I didn't understand it at all. You explain it in one fourth of the time and I completely understand it. I wish you were my professor.

[@solarlu]

I've been having issues with this. The flag trick actually helps so much. Thank you

[@israelg99]

You are the best! Thank you, I will happily donate and support you as a patreon :)

[@mohitmanujavideos]

it helps me lot thank you

[@OhimeFujoshi]

I never thought of thinking it in that flag trick! It's extremely easy to understand. My lecturer never would've thought of that so thank you very much for this

[@donalddrumpf292]

What's something that scientists use? Bunnygirl 45 lol!!!!!

[@yazdanriazi8157]

you are the best, I didn't go to the class even once, but after I saw your video for final exam, you show me best path to get everything, I really appreciate it

[@bray_bongani]

You my man are a life saver

[@arminsmajlagic2907]

Man u helped so much, traversals showed up on the exame and i was stuned. They were not in the study materials. Big thanks !!!

[@ivanchong8011]

Wonderful teaching ! nice method for the post pre in order traversals

[@mehadihasansanto538]

Awesome techniques! U really deserve more than billions of thanks!💖💖💖

[@tanishqsanka]

I wonder why you have very few views.....saved my day

[@SheriffAyew]

Very Helpful. Thank you for saving me hours of understanding

[@hinaafzal1254]

Thnx for uploading..it helped a lot..

[@tacopizza27]

The flag trick blew my mind!

[@Trevtutor]

Some of the best tricks are not taught in textbooks!

[@americaloveland4140]

you are the best u just saved my life

[@kalebjuliu7944]

holy shit this is amazing. Thank you so much

[@gianghayhoi]

bro, you save my life

[@superawesomecaptainmcfluff9506]

This flag thing is amazing. Thank you so much!

[@rezamorovati5065]

Thank you!

[@艾倫-x6x]

saved my day

[@AshishGusain17]

Flag trick was awesome

[@Ayeedmund]

Never comment but jeeez that flag trick is a life saver... genius

[@thepedzed]

For in-order traversal on unary operators, it seems that you should assume the edge is on the right side of the imaginary flag. Take -(x + 8) for example: ( - ) ¦ \ \ ( + ) / ¦ \ / \ ( x ) ( 5 ) ¦ ¦ ¦ = imaginary flag Perhaps a way to remember this is that -(x + 8) would be the same as 0-(x + 8). Or imagine the unary operator was the square root: √(x + 5) ( √ ) ¦ \ \ ( + ) / ¦ \ / \ ( x ) ( 5 ) ¦ ¦ ¦ = imaginary flag

[@abdulrahmanzidane2271]

brilliant trick

[@garciabyron218]

I should just send my tuition money to this guy instead of my school.

[@JamilBousquet]

Isn't a tree binary iff m

[@gizmo928]

thank you !!

[@arslanmurad3274]

Amazing Way!

[@prathmeshgg]

just wanna ask sir which aspiring mathematicians and computer scientist have username as Bunnygirl43?lol BTW thnx for this video

[@AllMeta]

Jokes on you, I have WoW directly on my C: drive

[@Trevtutor]

I put mine in /system32 for extra power

[@sebisuarez10]

I gave a like solely because of Bunnygirl45 lmao

[@Thebourrin777]

I noticed that if you put the flag downwards, you get the in-order traversal

[@JenniferZheng-x8u]

I don't really understand the flag. What does it mean?

[@Trevtutor]

It's just a trick for figuring out the order that each node should be written out if travelling counter-clockwise around the tree. It's not necessary to understand. Some people work better with visualizations.

[@JenniferZheng-x8u]

@@Trevtutor Thank you so much. Happy to know you are still here even after 9 years. Your videos are truely impactful!

[@georghieronymus9935]

Another example of where I feel like I wasted hundreds of dollars to have someone fail to teach this... Why am I even in college...

[@vpgsalty]

bunnygirl43. what a legend

[@1tz_dev]

I respect the humor

[@YashKatiyar-r3h]

Watching in India

[@volo7]

lol 3:57

[@PurpleMiniMoose]

Bunnygirl43 yep. 100% accurate lmao

[@vlxedits]

bunnygirl143 LOL