title
std::move and the Move Assignment Operator in C++
description
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detail
{'title': 'std::move and the Move Assignment Operator in C++', 'heatmap': [{'end': 174.048, 'start': 163.038, 'weight': 0.703}, {'end': 640.561, 'start': 610.064, 'weight': 0.776}, {'end': 863.963, 'start': 825.186, 'weight': 0.706}], 'summary': 'Covers move semantics in c++, emphasizing std::move and the move assignment operator, highlighting their significance in efficiently moving objects, and discussing the flexibility and benefits of using std move compared to traditional methods, along with the importance of including the move assignment operator in a class with a move constructor to avoid memory leaks.', 'chapters': [{'end': 82.563, 'segs': [{'end': 37.344, 'src': 'embed', 'start': 0.049, 'weight': 2, 'content': [{'end': 0.569, 'text': "Hey, what's up guys.", 'start': 0.049, 'duration': 0.52}, {'end': 1.57, 'text': 'My name is The Cherno.', 'start': 0.609, 'duration': 0.961}, {'end': 4.111, 'text': 'Welcome back to my C++ series.', 'start': 1.61, 'duration': 2.501}, {'end': 7.932, 'text': "So today we're going to be continuing on with our whole move semantics journey.", 'start': 4.571, 'duration': 3.361}, {'end': 12.974, 'text': 'If you guys have not seen the other videos in this kind of little mini series, then definitely check them out.', 'start': 7.952, 'duration': 5.022}, {'end': 14.215, 'text': "I'll have one linked up there.", 'start': 12.994, 'duration': 1.221}, {'end': 19.437, 'text': "That's going to be about move semantics in general, but there's also another video about L values and R values.", 'start': 14.255, 'duration': 5.182}, {'end': 23.579, 'text': "So, if you're new to this whole moving journey, make sure that you check those videos out,", 'start': 19.477, 'duration': 4.102}, {'end': 26.914, 'text': "because they're going to be important for what we'll be discussing today.", 'start': 23.579, 'duration': 3.335}, {'end': 28.156, 'text': 'So, so far,', 'start': 27.455, 'duration': 0.701}, {'end': 37.344, 'text': "we've basically learned the gist and all of the basics of move semantics what it means to actually be able to move one object into another.", 'start': 28.156, 'duration': 9.188}], 'summary': 'Continuing c++ series on move semantics, emphasizing importance of prior related videos.', 'duration': 37.295, 'max_score': 0.049, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE49.jpg'}, {'end': 61.925, 'src': 'embed', 'start': 28.156, 'weight': 0, 'content': [{'end': 37.344, 'text': "we've basically learned the gist and all of the basics of move semantics what it means to actually be able to move one object into another.", 'start': 28.156, 'duration': 9.188}, {'end': 42.769, 'text': "However, we haven't covered a crucial part of that, or should I say two crucial parts.", 'start': 37.824, 'duration': 4.945}, {'end': 47.493, 'text': "And instead of making two videos, one on each topic, I figured I'd combine them into this video,", 'start': 43.209, 'duration': 4.284}, {'end': 52.017, 'text': "because They're not particularly complicated topics and I think we can just get them done in one video.", 'start': 47.493, 'duration': 4.524}, {'end': 53.739, 'text': 'And that is std move.', 'start': 52.057, 'duration': 1.682}, {'end': 55.16, 'text': 'So what is that function??', 'start': 54.059, 'duration': 1.101}, {'end': 55.92, 'text': 'What does it do??', 'start': 55.26, 'duration': 0.66}, {'end': 57.041, 'text': 'When do we use it??', 'start': 56.121, 'duration': 0.92}, {'end': 58.222, 'text': 'When do we need to use it?', 'start': 57.101, 'duration': 1.121}, {'end': 61.925, 'text': 'And then also something called the move assignment operator.', 'start': 58.663, 'duration': 3.262}], 'summary': 'Learned move semantics basics, covering std move and move assignment operator in one video.', 'duration': 33.769, 'max_score': 28.156, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE28156.jpg'}], 'start': 0.049, 'title': 'C++ move semantics', 'summary': 'Delves into move semantics in c++, covering the concepts of std::move, move assignment operator, and their significance in moving objects efficiently.', 'chapters': [{'end': 82.563, 'start': 0.049, 'title': 'C++ move semantics explained', 'summary': 'Delves into move semantics in c++, covering the concepts of std::move, move assignment operator, and their significance in moving objects efficiently.', 'duration': 82.514, 'highlights': ['The chapter focuses on move semantics in C++, delving into std::move and move assignment operator, crucial for efficiently moving objects.', 'The Cherno continues the C++ series, providing insights on move semantics, std::move, and move assignment operator for effective object movement.', 'The chapter emphasizes the importance of std::move and move assignment operator in C++ for efficient object movement.']}], 'duration': 82.514, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE49.jpg', 'highlights': ['The chapter emphasizes the importance of std::move and move assignment operator in C++ for efficient object movement.', 'The chapter focuses on move semantics in C++, delving into std::move and move assignment operator, crucial for efficiently moving objects.', 'The Cherno continues the C++ series, providing insights on move semantics, std::move, and move assignment operator for effective object movement.']}, {'end': 358.359, 'segs': [{'end': 118.456, 'src': 'embed', 'start': 82.983, 'weight': 0, 'content': [{'end': 84.705, 'text': "And that's what we're going to be talking about today.", 'start': 82.983, 'duration': 1.722}, {'end': 88.328, 'text': 'But first, this video is sponsored by Skillshare.', 'start': 85.065, 'duration': 3.263}, {'end': 89.91, 'text': 'If you guys have not heard of Skillshare.', 'start': 88.468, 'duration': 1.442}, {'end': 99.278, 'text': 'Skillshare is an amazing online learning community where millions of creative and curious people come together into a brilliant community to learn something new.', 'start': 89.91, 'duration': 9.368}, {'end': 104.604, 'text': "They've got thousands of amazing classes on pretty much any creative topic you can think of.", 'start': 99.359, 'duration': 5.245}, {'end': 109.549, 'text': 'And one of the best parts, well, at least in my opinion, is that the classes are all so short.', 'start': 104.784, 'duration': 4.765}, {'end': 116.975, 'text': 'All the videos are so bite-sized that you can actually watch them in the spare five minutes you might have throughout your day,', 'start': 109.929, 'duration': 7.046}, {'end': 118.456, 'text': 'which I think is amazing.', 'start': 116.975, 'duration': 1.481}], 'summary': 'Skillshare offers short, bite-sized classes on creative topics, making it convenient for busy individuals.', 'duration': 35.473, 'max_score': 82.983, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE82983.jpg'}, {'end': 174.048, 'src': 'heatmap', 'start': 130.782, 'weight': 2, 'content': [{'end': 138.287, 'text': 'But Skillshare are actually offering the first 1000 people who click the link in the description below two months of free Skillshare premium.', 'start': 130.782, 'duration': 7.505}, {'end': 140.749, 'text': 'So definitely check that out for free and get started right now.', 'start': 138.307, 'duration': 2.442}, {'end': 144.49, 'text': "Because a great platform and it's a really good way to learn a new skill.", 'start': 141.209, 'duration': 3.281}, {'end': 149.813, 'text': "Speaking of learning new skills, let's get back to the move assignment operator and STD move.", 'start': 144.57, 'duration': 5.243}, {'end': 152.914, 'text': 'As always the best way to show this is going to be with an example.', 'start': 150.433, 'duration': 2.481}, {'end': 158.056, 'text': "So let's dive into the code from last, from the last episode, where we looked at move semantics in general,", 'start': 152.934, 'duration': 5.122}, {'end': 162.758, 'text': "and let's upgrade our string and entity class to be able to handle move assignments.", 'start': 158.056, 'duration': 4.702}, {'end': 166.72, 'text': "And we'll also be talking about STD move while doing that, since that's an important part.", 'start': 163.038, 'duration': 3.682}, {'end': 171.024, 'text': "So this is the String class from the last video, and here's our Entity class as well.", 'start': 166.82, 'duration': 4.204}, {'end': 174.048, 'text': "Let's first talk about std move and what it does.", 'start': 171.145, 'duration': 2.903}], 'summary': 'Skillshare offers 2 months free premium to first 1000 viewers. upgrade classes and learn new skills.', 'duration': 35.938, 'max_score': 130.782, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE130782.jpg'}, {'end': 208.62, 'src': 'embed', 'start': 183.357, 'weight': 4, 'content': [{'end': 189.723, 'text': "entity itself, in fact, is an example showing how to use string, which is the real thing we're interested in moving.", 'start': 183.357, 'duration': 6.366}, {'end': 197.991, 'text': "so what happens here, when we decide to actually take in a string as a temporary here, is, we're using std move, and this is from the last video.", 'start': 189.723, 'duration': 8.268}, {'end': 204.438, 'text': "we had to use it because this was a way for us to move this name temporary, which we're providing over here,", 'start': 197.991, 'duration': 6.447}, {'end': 208.62, 'text': 'into this kind of more or less permanent spot for it to live in.', 'start': 205.018, 'duration': 3.602}], 'summary': 'Using std move to move a string into a more permanent spot.', 'duration': 25.263, 'max_score': 183.357, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE183357.jpg'}], 'start': 82.983, 'title': 'Skillshare and std move', 'summary': 'Discusses skillshare, an online learning community offering thousands of bite-sized classes for under $10 a month and the usage of std move function and move assignment operator in c++ providing flexibility and benefits compared to traditional methods.', 'chapters': [{'end': 130.643, 'start': 82.983, 'title': 'Skillshare: bite-sized online learning', 'summary': 'Discusses skillshare, an online learning community with thousands of short, bite-sized classes on creative and business topics, available for just under $10 a month for an annual subscription.', 'duration': 47.66, 'highlights': ['Skillshare offers thousands of short classes on creative and business topics which can be watched in spare five minutes throughout the day.', 'The classes are available for just under $10 a month for an annual subscription.', 'Skillshare is an online learning community where millions of creative and curious people come together to learn something new.']}, {'end': 358.359, 'start': 130.782, 'title': 'Std move and move assignment operator', 'summary': 'Discusses the usage of the std move function and move assignment operator in c++, highlighting the benefits and flexibility it offers compared to traditional assignment methods, and demonstrating the process with examples from the string and entity classes.', 'duration': 227.577, 'highlights': ["The chapter offers the first 1000 people two months of free Skillshare premium by clicking the provided link, emphasizing the value of Skillshare as a platform for learning new skills. Skillshare is offering the first 1000 people two months of free Skillshare premium by clicking the link, showcasing the platform's value for learning new skills.", 'Demonstrates the usage and significance of STD move and move assignment operator through examples from the String and Entity classes, emphasizing the importance of efficiently handling move operations in C++. The chapter provides a detailed explanation and demonstration of the usage and significance of STD move and move assignment operator through examples from the String and Entity classes, emphasizing the importance of efficiently handling move operations in C++.', 'Explains the process of using std move to convert a string into a temporary object and move it into a new destination, showcasing the simplicity and efficiency of the move constructor in C++. The chapter explains the process of using std move to convert a string into a temporary object and move it into a new destination, showcasing the simplicity and efficiency of the move constructor in C++.']}], 'duration': 275.376, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE82983.jpg', 'highlights': ['Skillshare offers thousands of short classes on creative and business topics for under $10 a month.', 'Skillshare is an online learning community where millions of creative and curious people come together to learn something new.', 'The chapter offers the first 1000 people two months of free Skillshare premium by clicking the provided link, emphasizing the value of Skillshare as a platform for learning new skills.', 'Demonstrates the usage and significance of STD move and move assignment operator through examples from the String and Entity classes, emphasizing the importance of efficiently handling move operations in C++.', 'Explains the process of using std move to convert a string into a temporary object and move it into a new destination, showcasing the simplicity and efficiency of the move constructor in C++.']}, {'end': 942.564, 'segs': [{'end': 425.754, 'src': 'embed', 'start': 393.239, 'weight': 1, 'content': [{'end': 396.361, 'text': 'This is a brand new object that is being constructed.', 'start': 393.239, 'duration': 3.122}, {'end': 399.984, 'text': 'And as such, it will actually use the move constructor.', 'start': 396.521, 'duration': 3.463}, {'end': 403.626, 'text': 'Now, this leads into the move assignment operator, which is what I talked about.', 'start': 400.624, 'duration': 3.002}, {'end': 409.611, 'text': "An assignment operator, which I don't think we've covered in general in the C++ series, so that's definitely something that we'll do soon.", 'start': 404.087, 'duration': 5.524}, {'end': 418.833, 'text': 'But the assignment operator only gets called when we actually assign a variable into an existing variable.', 'start': 410.331, 'duration': 8.502}, {'end': 425.754, 'text': 'So, in other words, if we now wrote something like dest equals string or something like that, or more specifically,', 'start': 419.333, 'duration': 6.421}], 'summary': 'Introduction to move constructor and move assignment operator in c++. assignment operator will be covered soon.', 'duration': 32.515, 'max_score': 393.239, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE393239.jpg'}, {'end': 640.561, 'src': 'heatmap', 'start': 610.064, 'weight': 0.776, 'content': [{'end': 618.947, 'text': 'if this is not equal to other, so in other words, these are in fact different objects then nothing needs to be done and we can just return this,', 'start': 610.064, 'duration': 8.883}, {'end': 620.928, 'text': 'which is a reference to the current object.', 'start': 618.947, 'duration': 1.981}, {'end': 624.57, 'text': "So in other words, we only do the move if they're not equal.", 'start': 621.548, 'duration': 3.022}, {'end': 628.093, 'text': "If they are the same object literally, then we don't need to do anything.", 'start': 624.69, 'duration': 3.403}, {'end': 635.418, 'text': "If they're different objects but the data is different, you still need to do the move because you're still moving some other object into yourself.", 'start': 628.753, 'duration': 6.665}, {'end': 640.561, 'text': "So this isn't really like the assignment operator where you're doing a copy and if the data happens to match, you don't need to do anything.", 'start': 635.818, 'duration': 4.743}], 'summary': 'If objects are different, do the move; if same, do nothing.', 'duration': 30.497, 'max_score': 610.064, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE610064.jpg'}, {'end': 815.784, 'src': 'embed', 'start': 780.665, 'weight': 0, 'content': [{'end': 786.468, 'text': 'And then the destination destructor is destroying our character successfully.', 'start': 780.665, 'duration': 5.803}, {'end': 791.41, 'text': 'So that is the end of the move assignment operator and std move.', 'start': 786.728, 'duration': 4.682}, {'end': 798.514, 'text': 'So, in summary, the move assignment operator is something that you want to include in your class when you include a move constructor, because,', 'start': 791.59, 'duration': 6.924}, {'end': 802.917, 'text': 'of course, it might be desirable to move an object into an existing variable.', 'start': 798.514, 'duration': 4.403}, {'end': 805.919, 'text': "It's basically part of something called the rule of fifths.", 'start': 802.997, 'duration': 2.922}, {'end': 811.082, 'text': "There's something called the rule of thirds, and then there's the rule of fifths, which basically just includes all the new move semantics things.", 'start': 805.939, 'duration': 5.143}, {'end': 815.784, 'text': "We'll talk about that more in depth in later episodes of the C++ series as well.", 'start': 811.102, 'duration': 4.682}], 'summary': 'Use move assignment operator with move constructor for efficient object transfer.', 'duration': 35.119, 'max_score': 780.665, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE780665.jpg'}, {'end': 863.963, 'src': 'heatmap', 'start': 825.186, 'weight': 0.706, 'content': [{'end': 832.568, 'text': 'Keep in mind that by using this operator, it is literally the same as if we had written dot operator equals and called it like a function,', 'start': 825.186, 'duration': 7.382}, {'end': 837.49, 'text': "which is why, clearly, that would not work here, because we're not actually calling the assignment operator.", 'start': 832.568, 'duration': 4.922}, {'end': 844.133, 'text': "we're just constructing a new string that happens to use a temporary value, which is why the move constructor is being called.", 'start': 837.99, 'duration': 6.143}, {'end': 846.374, 'text': "Whereas here, we're actually calling a function.", 'start': 844.553, 'duration': 1.821}, {'end': 852.057, 'text': "So that's an important distinction and one of the things that used to confuse me in the past, because, as you can see,", 'start': 846.714, 'duration': 5.343}, {'end': 854.838, 'text': "they both look like assignment operators, but they're actually different.", 'start': 852.057, 'duration': 2.781}, {'end': 855.959, 'text': 'This is the move constructor.', 'start': 854.878, 'duration': 1.081}, {'end': 858.2, 'text': 'This is the assignment operator.', 'start': 856.379, 'duration': 1.821}, {'end': 863.963, 'text': 'And std move is what you want to do when you want to convert an object to be a temporary.', 'start': 858.38, 'duration': 5.583}], 'summary': 'Using std move converts object to temporary, calling move constructor instead of assignment operator.', 'duration': 38.777, 'max_score': 825.186, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE825186.jpg'}, {'end': 872.828, 'src': 'embed', 'start': 846.714, 'weight': 2, 'content': [{'end': 852.057, 'text': "So that's an important distinction and one of the things that used to confuse me in the past, because, as you can see,", 'start': 846.714, 'duration': 5.343}, {'end': 854.838, 'text': "they both look like assignment operators, but they're actually different.", 'start': 852.057, 'duration': 2.781}, {'end': 855.959, 'text': 'This is the move constructor.', 'start': 854.878, 'duration': 1.081}, {'end': 858.2, 'text': 'This is the assignment operator.', 'start': 856.379, 'duration': 1.821}, {'end': 863.963, 'text': 'And std move is what you want to do when you want to convert an object to be a temporary.', 'start': 858.38, 'duration': 5.583}, {'end': 872.828, 'text': "So, in other words, if you need an existing variable to become temporary, in the sense that you're basically marking it as hey,", 'start': 864.483, 'duration': 8.345}], 'summary': 'Std move converts object to temporary for existing variable.', 'duration': 26.114, 'max_score': 846.714, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE846714.jpg'}], 'start': 358.419, 'title': 'Move assignment operator in c++', 'summary': 'Discusses the implementation and usage of the move assignment operator in c++, emphasizing the importance of including it in a class with a move constructor, and the distinction between move constructor, assignment operator, and std move. it also explains the use of std move to efficiently move objects, emphasizing the creation of a new object, and the importance of overwriting the current object to avoid memory leaks in the move assignment operator.', 'chapters': [{'end': 585.205, 'start': 358.419, 'title': 'Understanding move assignment operator in c++', 'summary': 'Explains the use of std move to efficiently move objects, emphasizing the creation of a new object, and the importance of overwriting the current object to avoid memory leaks in the move assignment operator.', 'duration': 226.786, 'highlights': ['The move constructor is used when creating a new object, and it will actually use the move constructor. Emphasizes the use of move constructor for creating a new object, ensuring efficient memory management and object construction.', 'The move assignment operator is discussed, emphasizing the importance of overwriting the current object to avoid memory leaks. Explains the significance of overwriting the current object in the move assignment operator to prevent memory leaks and ensure proper memory management.', 'The importance of overwriting the current object in the move assignment operator is highlighted to avoid memory leaks. Emphasizes the critical need to overwrite the current object in the move assignment operator to prevent memory leaks and maintain proper memory management.']}, {'end': 942.564, 'start': 585.305, 'title': 'Move assignment operator in c++', 'summary': 'Explains the implementation and usage of the move assignment operator in c++, emphasizing the importance of including it in a class with a move constructor, and the distinction between move constructor, assignment operator, and std move.', 'duration': 357.259, 'highlights': ['The move assignment operator is essential in C++ classes with a move constructor, as it allows the transfer of ownership of resources from one object to another, improving performance and efficiency. improving performance and efficiency', 'The distinction between move constructor, assignment operator, and std move is highlighted, emphasizing the need to use std move to convert an existing variable into a temporary to enable the usage of move constructor or move assignment operator. emphasizing the need to use std move', "The chapter also mentions the 'rule of fifths' in move semantics, indicating a deeper discussion on the topic in later episodes of the C++ series. indicating a deeper discussion"]}], 'duration': 584.145, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/OWNeCTd7yQE/pics/OWNeCTd7yQE358419.jpg', 'highlights': ['The move assignment operator is essential in C++ classes with a move constructor, as it allows the transfer of ownership of resources from one object to another, improving performance and efficiency.', 'The move constructor is used when creating a new object, and it will actually use the move constructor. Emphasizes the use of move constructor for creating a new object, ensuring efficient memory management and object construction.', 'The distinction between move constructor, assignment operator, and std move is highlighted, emphasizing the need to use std move to convert an existing variable into a temporary to enable the usage of move constructor or move assignment operator.', 'The importance of overwriting the current object in the move assignment operator is highlighted to avoid memory leaks. Emphasizes the critical need to overwrite the current object in the move assignment operator to prevent memory leaks and maintain proper memory management.', 'The move assignment operator is discussed, emphasizing the importance of overwriting the current object to avoid memory leaks. Explains the significance of overwriting the current object in the move assignment operator to prevent memory leaks and ensure proper memory management.', "The chapter also mentions the 'rule of fifths' in move semantics, indicating a deeper discussion on the topic in later episodes of the C++ series."]}], 'highlights': ['The chapter emphasizes the importance of std::move and move assignment operator in C++ for efficient object movement.', 'The chapter focuses on move semantics in C++, delving into std::move and move assignment operator, crucial for efficiently moving objects.', 'The Cherno continues the C++ series, providing insights on move semantics, std::move, and move assignment operator for effective object movement.', 'Demonstrates the usage and significance of STD move and move assignment operator through examples from the String and Entity classes, emphasizing the importance of efficiently handling move operations in C++.', 'Explains the process of using std move to convert a string into a temporary object and move it into a new destination, showcasing the simplicity and efficiency of the move constructor in C++.', 'The move assignment operator is essential in C++ classes with a move constructor, as it allows the transfer of ownership of resources from one object to another, improving performance and efficiency.', 'The move constructor is used when creating a new object, and it will actually use the move constructor. Emphasizes the use of move constructor for creating a new object, ensuring efficient memory management and object construction.', 'The distinction between move constructor, assignment operator, and std move is highlighted, emphasizing the need to use std move to convert an existing variable into a temporary to enable the usage of move constructor or move assignment operator.', 'The importance of overwriting the current object in the move assignment operator is highlighted to avoid memory leaks. Emphasizes the critical need to overwrite the current object in the move assignment operator to prevent memory leaks and maintain proper memory management.', 'The move assignment operator is discussed, emphasizing the importance of overwriting the current object to avoid memory leaks. Explains the significance of overwriting the current object in the move assignment operator to prevent memory leaks and ensure proper memory management.']}