Check out the hands on guide - ruclips.net/video/GVEcLAX7ogk/видео.html Get notified of my upcoming C/C++ Courses - www.codebreakthrough.com/upcoming-c-cpp-courses
Every time I have a technical interview, I watch this video again. But this time was different. Something clicked in my mind 🤯 Thanks, Caleb! I've followed you since you started the channel, and I've learned so much from you. Thanks a lot, man!
Wow, Caleb! Thank you so much for starting this series. I am in the middle of your first series of C++. That series is really awesome. I like your teaching style. You are a great teacher. I found you concluded the previous series a little short. I am delighted to see this intermediate series is started. Kindly continue this series. Your series is really helpful.
Nice, idk if you explained it really well or if after playing with references and coming back to an explanation was the final thing to make me understand this concept, but I feel like I finally get it.
Love this video, he really does explain it far better than the course material in the 300 level undergrad course I'm currently taking. Also... LEEEEEEEEROYY JENNNNNNNNKINS
Few basic examples to remember: void work (x){return x;} // No reference void work (&x){return x;} // Argument reference void& work (x){return x;} // Function reference void& work (&x){return x;} // Argument + Function reference int& a=b; reference variable to variables int&& ref=work(x); reference from function (without reference) to variable int& ref=work(x); reference from function (with reference) to variable
After watching this video I have two things to say: 1 - thank you, your explanation is heaven sent and 2 - after your Leeroy Jenkins comment, I gotta ask. You play WoW, because if you do were gaming 😂
"Maybe that's a bit more depth than you need for this introductory video" Nope. Not for me, at least. That last detail you went over was super helpful. Thank you for the great video!
QUESTION: 7:58 to 8:04....doesn't "int &x" at the function refer to the 'address' of 'a' rather than the 'value ' of a ( ie '5')? That is, when we call the function, aren't we passing in the "address of a" rather than the "value of a"?
How I think of it working is: when you call work(a), internally the program is saying int & x = a; and then doing the things on x. I need to retrain my brain on how the function arguments work from my Java days, but the 'int' is always correct, and says that the function expects an integer. If it is 'int & x', it will get a reference to an integer, and if it is 'int * x' it will get a pointer to an integer.
hey beginners - if you want a simple explanation, here it is. when you name a variable, the compiler makes a table with that variable name in one column and a number in another column. the number is what you get when you use a reference. the number is an address in whatever memory space is in use - you don't have to worry about that, the linker handles physical placement. once you have the number stored, you can write to or read from memory. now, slightly more complex is that you can also do pointer math and move around in memory on your own, reading and writing things that may not have a variable name associated with them. So you can say "go to the spot where variable a is, then advance 2 bytes in memory and write a 3 there" that allows you kind of direct access to the memory space. there you go - 15 minutes saved for those of you who don't need so much hand holding.
I got problems but I had problems with understanding reference. It seems to me like reference is sometimes treated as a memory address but then you can also treat them as normal variables. When it comes to pointers it is clear when that you always have a memory adress and if you want to see what is on that memory address, or change what is on that memory address, you deference the pointer by putting a * in front of the pointer. These references are a little bit confusing because they sometimes act as pointers and they sometimes act as normal variables. I don't see why I can't just replace references with pointers. For instance the function swap would go like this. void swap(int* a, int* b) { int temp = *a; *a = *b; *b = temp; } Also, when you use pointers as arguments of a function you know you are passing memory addresses to the function so you expect that the function might change the variables whose addresses you are passing. I find pointers more clear and understandable than references.
This is a great video and I understand references and pointers now (from your other video). However, I could change the variables that were passed in as parameters even without references. For example (in C++ still because I've been learning for 2 days so far lol): void Swap(int x, int y) { int temp = x x = y y = temp } And that works fine so 🤷
its not the same as he said in this case x and y would be a copy of the values you passed, the variables outside the fuction will still be the same even if you change the values in x and y
@@flyingspaghettimonster8612 Oh ok thank you, would I need to create a reference inside the function then and then change the value of that reference? That's pretty cool
Frankly it is very difficult to give my comments to anybody but you deserved highly top and your flag is great I am still can't find thanking words for long time being misunderstood.
this is mean, reference is not a new variable refer to specific place in memory? it is the variable which it refer to??!! so this is not add on size of memory one place! right?
Check out the hands on guide - ruclips.net/video/GVEcLAX7ogk/видео.html
Get notified of my upcoming C/C++ Courses - www.codebreakthrough.com/upcoming-c-cpp-courses
Thanks Caleb, I've been following your C++ Tutorial way back 2019 because you are a great teacher, you saved me a lot.
I've been looking for a follow up to his C++ course. Any suggestions?
@@rohanarya5400 get working on eulerprojects Github and Codeforces. You could get a reading on the book 'code'.
The fact that this guy is currently carving our way for our future just for us is priceless
Fax
If this was your future, YOU would carve it for yourself.
*sees an asterisk in code*
My brain “OHHH HEEELLLLLLL NOOOOOO”
@Messiah Atticus Hehe nice scam
You described my last week so well.
I've been like this since C
I'm here to stop my confusion about pointers
I can hear your comment
This is the first time any C++ concepts really started to "click". Bro, keep up the good work! Thank you for your help!
I've been struggling for weeks trying to understand this and pointers and you literally got it to click in 15mins. You're amazing, subscribed.
Every time I have a technical interview, I watch this video again. But this time was different. Something clicked in my mind 🤯 Thanks, Caleb! I've followed you since you started the channel, and I've learned so much from you. Thanks a lot, man!
Did you play the clip? 😂😂
Man I love his vids. You can't be bored to death.
Commenting for Yt algorithm
Thanks for the great explanation! I am new to C++ and needed to understand this, and also the part after 13:00 was very informative and useful!
Wow, Caleb! Thank you so much for starting this series. I am in the middle of your first series of C++. That series is really awesome. I like your teaching style. You are a great teacher. I found you concluded the previous series a little short. I am delighted to see this intermediate series is started. Kindly continue this series. Your series is really helpful.
Thank you Caleb! I'm in a C++ bootcamp and your channel has taken me from failing to an A!
this is great. Now I got it. My prof sucks. He mixed pointer and ref and totally confused us.
Because it is very simple... which is why we need to talk about it. 😂
This was a wonderful video. I'll be patiently waiting for more.
I didn't expect that C++ lesson on blackboard can be so good, excellent job
Crazy. I was reviewing this earlier! Keep it up!
Wish I found this video sooner. After 4 hours of trying to understand this concept I finally get it haha. Thanks!
You're truly the best coolest teacher i have ever seen in my life
Nice, idk if you explained it really well or if after playing with references and coming back to an explanation was the final thing to make me understand this concept, but I feel like I finally get it.
Love your teaching method and your comedy sprinkled throughout! Thanks man!
Love this video, he really does explain it far better than the course material in the 300 level undergrad course I'm currently taking.
Also... LEEEEEEEEROYY JENNNNNNNNKINS
Thanks for this. POinters feels like a game of inception in my head. Especially when it comes to pointers to pointers
I was struggling for way too long why "int& myVar" and "int &myVar" popped up inconstantly. Thank you so much for pointing this out
the way you teach is very effective and easy to understand. Thank you!
Thank you for explaining the memory efficiency of references, I like to know why code is "best practise"
Few basic examples to remember:
void work (x){return x;} // No reference
void work (&x){return x;} // Argument reference
void& work (x){return x;} // Function reference
void& work (&x){return x;} // Argument + Function reference
int& a=b; reference variable to variables
int&& ref=work(x); reference from function (without reference) to variable
int& ref=work(x); reference from function (with reference) to variable
This can't be explained better than this. Top notch
This was incredibly helpful, thank you for the detailed explanations!
for the first time ever i actually understood the references
After watching this video I have two things to say: 1 - thank you, your explanation is heaven sent and 2 - after your Leeroy Jenkins comment, I gotta ask. You play WoW, because if you do were gaming 😂
"Maybe that's a bit more depth than you need for this introductory video"
Nope. Not for me, at least. That last detail you went over was super helpful. Thank you for the great video!
Best caleb in the world 👍❤️
this is awesome! thank you so much for creating these illuminating lectures !
You make learning this like 10 times more fun, i apprecieate it!
10:35 troll joke made me chuckle out loud, great video!
Young and Intelligent Your the best teacher Caleb.
From Ethiopia
You are a great instructor.
QUESTION: 7:58 to 8:04....doesn't "int &x" at the function refer to the 'address' of 'a' rather than the 'value ' of a ( ie '5')? That is, when we call the function, aren't we passing in the "address of a" rather than the "value of a"?
How I think of it working is: when you call work(a), internally the program is saying int & x = a; and then doing the things on x. I need to retrain my brain on how the function arguments work from my Java days, but the 'int' is always correct, and says that the function expects an integer. If it is 'int & x', it will get a reference to an integer, and if it is 'int * x' it will get a pointer to an integer.
You're literally the best, thank you so much!
So basically a reference is like a desktop shortcut for an exe application.
"But no... you just got trolled" I almost spit my coffee
i am in love with your teaching style.
so far the best explonation i could find
this video is actually fantastic, thank you so much, i appreciate your work, keep it up and good luck with everything :D
I hate this dude when i was noob but still want to see this dude
Great explanation Caleb! Awesome. Way to go!
concise and clear. thanks dude
hey beginners - if you want a simple explanation, here it is.
when you name a variable, the compiler makes a table with that variable name in one column and a number in another column.
the number is what you get when you use a reference.
the number is an address in whatever memory space is in use - you don't have to worry about that, the linker handles physical placement.
once you have the number stored, you can write to or read from memory.
now, slightly more complex is that you can also do pointer math and move around in memory on your own, reading and writing things that may not have a variable name associated with them. So you can say "go to the spot where variable a is, then advance 2 bytes in memory and write a 3 there"
that allows you kind of direct access to the memory space.
there you go - 15 minutes saved for those of you who don't need so much hand holding.
He what did he type looks 8 or & idk what he type
Bro. You're a beast. This is just what I was looking for.
I like the technique of your teaching. Really it's a great tutorial man
you explain things the best ive seen. thanks
This was such a great video all sorts of confusion got cleared so well. Thanks brother.
I got problems but I had problems with understanding reference. It seems to me like reference is sometimes treated as a memory address but then you can also treat them as normal variables. When it comes to pointers it is clear when that you always have a memory adress and if you want to see what is on that memory address, or change what is on that memory address, you deference the pointer by putting a * in front of the pointer. These references are a little bit confusing because they sometimes act as pointers and they sometimes act as normal variables. I don't see why I can't just replace references with pointers. For instance the function swap would go like this.
void swap(int* a, int* b) {
int temp = *a;
*a = *b;
*b = temp;
}
Also, when you use pointers as arguments of a function you know you are passing memory addresses to the function so you expect that the function might change the variables whose addresses you are passing. I find pointers more clear and understandable than references.
Thank you! This was well detailed and clear.
This is a great video and I understand references and pointers now (from your other video).
However, I could change the variables that were passed in as parameters even without references.
For example (in C++ still because I've been learning for 2 days so far lol):
void Swap(int x, int y)
{
int temp = x
x = y
y = temp
}
And that works fine so 🤷
its not the same as he said in this case x and y would be a copy of the values you passed, the variables outside the fuction will still be the same even if you change the values in x and y
@@flyingspaghettimonster8612 Oh ok thank you, would I need to create a reference inside the function then and then change the value of that reference? That's pretty cool
Just finished the last series and I really hope this is the start of part 2
Great video! Exactly the explanation I was searching for
Bravo! Thank you.
Nice video. I like how you dont write any code on a computer. makes it better
Thanks Caleb.you are an amazing teacher.
I love the way that you write & diffrent in every time😂😂
there is no love it button, so i will type. Love it, thanks a lot.
A reference (ref) does not occupy memory space, cannot be null, and cannot be modified. Attention!!!
4:28 I actually thought all this time that this were 3 completely different things. And it's just a variation in writing.
Wait, is this C++ series part 2
kinda
@@lexuthelexer1212 ok thanks
Thank you so much ✨
1:41
9:40
you make it sound easy
Thank you for this very useful video!
Nice! Thank you for this.
just perfect ! thank you!!
At 13:30, what if you did like &b = &c? Would that work or can you only assign b directly and not it's address?
Thank you very much. God bless!!!
Good tutorial. Thanks.
Dude you are on fire today.
Very well explained!
Thanks man. You helped me a lot.
Frankly it is very difficult to give my comments to anybody but you deserved highly top and your flag is great
I am still can't find thanking words for long time being misunderstood.
This is FUN-THEN-MENTAL (fudamental)
this is mean, reference is not a new variable refer to specific place in memory?
it is the variable which it refer to??!!
so this is not add on size of memory one place!
right?
Great video, thank you man
exactly what i looking for!
your r great... such a simple and clear explantion /////
Dude you own.
Thanks caleb 💛
Thank you well explained
Hey can you make something on typescript
Thanks Caleb
Thanks a lot!
IS THE USE OF "&" SAME AS WHEN YOU USE IT I EXCEL?
Great video!!!
Well explained
This is awesome !
Thanks for the tips
how can we use pointer to reference like this (int *& a)
Yeah bro, if I make any serious amount of success, you're getting a fat check. You deserve my money more than my university does.
thank you for this
you look like someone i know in france
Your the best bro