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Views : 73,583
Genre: Science & Technology
Date of upload: Jan 12, 2023 ^^
Rating : 4.958 (52/4,941 LTDR)
RYD date created : 2024-04-25T21:55:48.996883Z
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YouTube Comments - 413 Comments
Top Comments of this video!! :3
Nonbinary numbers
622 |
3:20 2.1 billion is for a SIGNED int. unsigned int goes to 4.2 billion
53 |
Just a heads up on a slight inaccuracy: you described the âsigned magnitudeâ representation of signed integers, but modern hardware doesnât use this. It uses the âtwoâs complimentâ representation. This representation allows for integer addition and subtraction to run on the same hardware, and makes it so taking the negative of a number is as simple as flipping all of the bits of the number and adding 1.
Either way, nice refresher on my CS101 course from a few years ago!
186 |
Integer sizes also play a major role in networking. Double your integer size and you will double your network usage, and consequent costs, both for transmission of said bytes, and processing/storage on your server. Especially relevant for MMOs.
54 |
5:58 correction, we don't use a sign bit to represent a number which would result in the existence of 0 and -0 (negative 0), for example 0000 and 1000 in int4, instead we use 2's complement numbers, where essentially we take the leftmost bit and flip it's sign, for example xyzw int4 would equal to 2^0*w + 2^1*z + 2^2*y - 2^3*x (attention to the minus in the equation)
100 |
It's not true, that bigger integers are necessarily slower.
Often math on bigger integers is even faster than on smaller ones. The most efficient number is often the one corresponding to the architecture. If you're on a 32 bit system, 32 bit integers are often the fastest, if you're on a 64 bit system, 64 bit integers are often the fastest.
But what's more important than that is cache size and alignment. Using bigger numbers might be bad for the cache, using different sizes of integers depending on the use case might be bad for the alignment. The latter is normally optimized by the compiler, so there is empty space between integers, so you don't have the smaller size for using smaller integer sizes for some values, while still using having the overhead of doing math with smaller integer sizes.
40 |
This video on binary numbers and buffer overflow/underflow is an absolute gem! The explanations were clear and easy to follow, and the real-world applications highlighted throughout made the material relatable and understandable. It's a great resource for anyone looking to deepen their knowledge on the subject matter. Thanks for sharing.
10 |
I remember being mindblown by the fact that addition and substitution work the same regardless of the sign you use
19 |
Dude every video you make has something cool and nerdy in it I love it. Thanks for contributing man.
I was installing Linux the other day and wound up on your vids.
I was learning how to a cook a dessert and wound up on your vids.
I was learning about security vulnerabilities and wound up on your vids.
You're like a a modern lightweight tech-Da Vinci. That's intended to be a compliment. :)
112 |
Your video games to make the subject much more approachable is a great idea. I will be showing this video to my students for sure. Keep up the great work.
28 |
This is a solid video, but also a bit of a missed opportunity to explain more about two's complement and the alternatives, and why two's complement is better. In part two, maybe?
14 |
Nice to see runescape featuring....btw if anyone wants to double their GP just meet me at the grand exchange...
9 |
I always prioritize your Linux videos over other's, but comp sci by you would be gold for me.
34 |
It's not a sign bit, it's two's complement. The leftmost bit gets it's magnitude flipped so for example instead of 128 it's -128, so a value of 1000 0000 is -128 (which is why a signed int8 with value 127 will overflow)
14 |
3:24 Should it be *signed*, rather than unsigned? An unsigned 32-bit integer should be able to go up to 4.2bill instead of only 2.1bill, if I'm not mistaken.
19 |
My uni started us of C. They did it to filter out all the people that lacked motivation.
5 |
I have to say, you are really good at explaining. I struggle with abstract concepts often, but you provide clear examples that give context. I watch most of your stuff regardless, but more teaching video's like this would definitely be interesting!
2 |
Love the way you explained this stuff, I remember back in uni not everyone could wrap their heads around why this was even a thing.
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This channel is by far much better than the classes I got in university
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@zander07
1 year ago
I have great respect for people that take any concept, simple or complex, and explain them in a way such that anyone can learn them
437 |