Classes part 3 - Copy Constructor, Copy Assignment(Deep and Shallow Copy) | Modern Cpp Series Ep. 39

►Lesson Description: In this lesson I cover the copy constructor, and copy assignment operator. I start by showing how the compiler gives you these two special functions for classes for free, using the compiler generated ones. Unfortunately, this is not sufficient, as when we have to dynamically allocate memory, the trivial copy can result in problems like double frees or unwanted sharing of data. Next I show you how to avoid making these 'shallow' copies, and write your own copy constructor and copy-assignment operators to perform a deep copy.

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[kenk]

Does "Array myArray2 = new Array(myArray); " triggers copy-constructor as well?? If yes, I assume the difference is allocating myArray2's memory on heap?

[noelgallagher]

Wow, I dont understand how this is not 100k+ views, this is by far the best explanation I"ve seen of this concept !

[astbast]

This is the best c++ playlist on youtube by far!!!!

[atlasflare]

Thanks for publishing these videos to public. Your teaching style is fantastic.

[crazymemes]

Omgg 😮 this is c++ goldmine so excited to complete this playlist.

Request: please make videos on building tools using c++, I always want to develop something using c++ but dunno how to start, thanks man.

[punchline]

Fantastic tutorial, as I'm learning UE5 C++, this tutorial is helping me a lot to understand what is happening there

[sallaklamhayyen]

You are a great teacher thank you so much for this valuable content
please continue

[VoidloniXaarii]

So thankful for all your amazing lessons

[vimalathithand]

Damn ! Such a clear and wonderful explanation.! You deserve much more views and subs sir...!
It would be very useful if you could do a video on namespace, scope of variablesand functions in namespace, inline keyword and how scopes and lifetimes of identifiers defined in different circumstances and the best practices to be used in header files!
And im a bit confused between difference between file scope vs global scope and gobal namespace parent namespaces. It'd be of great help if you could enlighten me ! Thanks a lot!!

[embeddedMikeTV]

Interesting channel. C++ topics are very well explained here.

[Quancept]

Mike, a quick question. In the copy assignment function why do we delete[] before assigning new heap area for the new data object? delete[] operation marks the area as free right, thereby making the data pointed by the original object a dangling pointer? Am I missing something here? Please help! Thanks

[reptilicusrex]

Thanks for making this video. It's an excellent explanation.

[mfc]

Just wanted to stop by and see you're awesome! I just started learning C++ coming from python and Go and your videos have really helped me. They are currently my main source of learning! Thanks for the great content.

[dhanushs]

Very neatly explained as always. Thank You

[sowmya]

Hi Mike, Thank you for the video. This is the best video that i watched which explains both copy constructor and copy assignment operator clearly.

[deepblackoutlaw]

My go-to resource for C++ tutorials, you're the best! 📚🙌

[joebosah]

Thanks, Prof
Can’t get enough
MasterClass
Kept revisiting
Quite clear in my head

[hossamalzomor]

Thanks for the clear explanation
But do we need to delete the allocated memory and reallocate it again in the copy assignment operator?

[johnmckown]

Thinking back to previous video, what if the pointer were a unique pointer? Before you made the copy constructor?

[sauravshaw]

Hey Mike! Thanks for the videos can you explain why we need to return as Array&, we can simply use Array right?