C++ POINTERS (2025) - What is a dynamic two-dimensional array? (MULTIDIMENSIONAL dynamic arrays)

[@CodeBeauty]

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[@David_gee_the_1]

@CodeBeauty Is it possible to create a 2d dynamic array without know the number of columns before hand?

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One of the most intuitive explanation on the dynamic 2d array I've ever seen. Thank you!

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Undoubtedly this is the best explanation of "dynamic two-dimensional array" I've ever seen.

[@zombiehellmonkeygaming1956]

Thank you so much for this video. I've been creating dynamic multi-dimensional arrays for hash tables without really understanding why I use double pointers, and for that reason I've been unallocating the memory incorrectly too! Your explanation is very clear and easy to understand, and I love how you used the spreadsheet to demonstrate the concept. It filled a large piece of missing knowledge for me!

[@CodeBeauty]

🤗🥰

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[@CodeBeauty]

☺️💕

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I'm watching this video again (probably the fifth time) because I just completed a Python then a Java course, and now I need a C++ refresher! Thanks!

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The best explanation that I've seen so far! This video worth much more than 7K views...

[@CodeBeauty]

Thank you so much! I'm glad that you think so! 🙏💙

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Very helpful content. Please know that people like me recognize the effort you are putting in and appreciate the trouble you are going through to explain these concepts. I have seen many other videos, but have found yours to be hitting all the necessary points i.e., a) mechanism and sequence of allocation, b) visualization of the allocation process c) sequence and importance of the delete operation -

[@kiddbora]

I have a question: at 11:20, she writes table[i] , but we are referring to 1st level of pointers there? isnt it supposed to be: *table[i] = new int[cols] instead? If we dont put an asterisk and just write table[i], arent we referring to the 2nd level pointer which only holds 00EEEE address here? (memory cells she drew on A column)

[@kiddbora]

I'm so confused. I kept watching and she writes table[1][2] to access the values inside. Isnt she supposed to write **table[1][2] instead? Pls help :(

[@kiddbora]

I figured it out. In the previous videos, she also mentions that indexing an array also dereferences it. So when using 1 index, dereferences once, when using 2 indexes in 2D arrays, dereferences twice. no need for asterisks there

[@labiaJohnken2567]

lucky to watch it at the right time when i was stack from the textbook.honestly, it's well explained .

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[@handover007]

Very well explained. First time I got to understand this well. thanks and keep making programming easier to learn.

[@CodeBeauty]

🚀✨️🥰

[@Kenforbes3]

Thanks!

[@CodeBeauty]

Thank you! 🥰

[@Makornak]

Got confused reading this from my textbook, your video broke it down so it was much easier to understand. Thanks!

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[@CodeBeauty]

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Thank you so much for your kind words! I'm truly glad that my videos have helped you and made difficult topics more understandable. 🥰❤️‍🔥

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i've been searching for an explanation for this topic, and you've explained it well! thank you!

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Thanks I finally understand, instead of creating pointers for each row , you create a pointer that point to a pointer that you add bytes of memory into it, so it skip the part that you need to create pointers for each row, thanks alot!

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[@CodeBeauty]

Thanks. The topic is pretty hard to understand, so I used visual examples to help with that, and it's pretty normal to watch the video once, and then to watch it again in a day or two, or to watch it a few times, so that you remember everything. 😊

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[@Kenforbes3]

Perfect explanation of C++ dynamic two-dimensional array operations. Thank you!

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[@CodeBeauty]

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[@CodeBeauty]

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[@henkfinkers3931]

This might seem like a really weird question but could you later expand on the size of your array/table? Say I have a 10 elements long array and I want to append an eleventh element. Is this possible or would you need to redefine another array, copy the data over and add your new value?

[@CodeBeauty]

No, you can't. Array stores data in continuous memory, and once the memory is allocated, you cannot expand it. So you are right, create a new bigger array and copy the data to it. Also, considering that the array stores elements in continuous memory, accessing those elements is a lot faster than accessing elements of a linked list for example, so arrays have both advantages and disadvantages 😊

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thank you for helping me get rid of the pointers fear :")

[@ingrid2748]

I just have an exercise about this! I have to make a vector like class without using vector library and working instead with a Dynamic Array. Thanks so much for this!

[@CodeBeauty]

That is a very common assignment for students and a very good one. Hope that the video will help. 😊 And if you want to take it a step further, and really make something to impress, you can use the video about generics that I published a few hours ago and make a more advanced vector-like collection vector, vector, vector 🤓

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[@CodeBeauty]

☺️🤗

[@ezgi.yyt41]

thank you so much for this video! Thanks to you, I finally understand multidimensional arrays

[@CodeBeauty]

I'm glad to hear that ❤️

[@ashur026]

Thank you so much for the clear explanation. your visualization is what made me understand the concept.

[@CodeBeauty]

I know that it is a pretty complex topic to understand, so I tried to make it as simple as possible. It is awesome that visual examples help! 😊

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Beautifully explained!! Gratias :)

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Content and the the way u explain is fantastic

[@handyabrown]

Great video! Thinks for explaining in simple terms what a two dimensional array is, and then how to properly create one.

[@CodeBeauty]

☺️🤗

[@anz111]

I was stumped on an assignment due to the double pointers operator stuff, and thanks to your video I realized it was actually a multidimensional array.

[@Pantsnsocks]

This is such a great explanation! Thank you for showing a clear visual representation of a difficult to grasp concept.

[@davialbuquerque1880]

Your explanation was better than my professor's

What a magnificent and beautiful multidimensional array!

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[@CodeBeauty]

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[@CodeBeauty]

Good luck with your exam! 🤞🤗

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[@CodeBeauty]

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I'm happy to hear that you like it 🥰

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best explanation on multidimensional array with pointers, I am currently struggling with this topic. The used of the excell table at the beginning of the video oreally helps clarify the idea better.

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[@Vincent-ht7eb]

At firt I just wanted to add a little comment and then it appened what you can read below: Thanks for all. I lerned a lot with you. The most about arrays and vegetables 😉. As a lot of your followers I really like the way you teach with the the well accent you get, the great moves you do (sometimes I can see directly the memory spaces on the top of you finger when it's describing it) and the simple but powerfull way you use interfaces you use to show it (VS, excel sheet, ...). And I'm agree with you that knowing many programing languages is logical when beeing a developer. And learning a new one can help to understand an other already know but not 100% understood. And know I have an important question for me: how to deal with the differents methodologies we have today for developing? Every job's offers say that we should know "developing on an agile environment" but I read many about srum and I used unitary tests but they doesn't fill well my need. Because they doesn't give me a good way to structure my program, my classes. Yes for me using Test Driven Development or/and Scrum looks like not enought and will finally lead the structure of the program falling to bullshit. So I searched and found DDD for Domain Driven Design. And this methodology gave me my missing tool. But nobody know it and nobody use it. 🤣 So I would say the best methodology sould be using an agil method like Srum with DDD and checked with unit tests. But it could be nice having your point of vue on this topic. I've looked this tutorial for DDD: openclassrooms.com/en/courses/6121861-apply-a-domain-driven-design-approach-to-development/6353721-adapt-your-diagram-to-changing-client-needs And then I have read this book: DDDvitefait.pdf (because I'm a french speaker and I didn't found an other synthetic tutorial in english on this topic). Again thanks for your passion 👍

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[@CodeBeauty]

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