11:49 - There are a few other differences between var, let and const. 1. Var can be redeclared while let and const cannot be redeclared. 2. Both var and let can be declared without assigning a value while const needs to have a value assigned when you are declaring it. 3. Additionally during JS execution var is "hoisted" therefore all the var variables are first brought to the start of your code by JS and with an undefined value, before it executes your code. Let and const are not "hoisted" in the sense of the word but are instead stored in temporal dead zone (a memory allocated used to store such variables for the time between declaration and initialization).
was a amazing video, But you left some important Question like:- Clouser, Lexic Scope, spread and Rest Operator, Destructring, First class function, Pure and impure Function, function currying, Map filter and reduce, call apply and bind, prototype chaining. Thanks a lot.
Heartfull thanks for your all videos. In Javascript interview videos Top 25 JavaScript Interview Questions for Beginners In callback function question What are CallBack function? V IMP your example explanation function display(x,y,operation){ var result = operation (x,y) ; console.log(result); } display(3,9,add); Sorry for for your effort. I am try to add first line in your code example const add = (a,b) => a+b; I got result, Many many thanks for you. Now i am very very happy,
Heartfull thanks for your all videos. In Javascript interview videos Top 25 JavaScript Interview Questions for Beginners In callback function question What are CallBack function? V IMP your example explanation function display(x,y,operation){ var result = operation (x,y) ; console.log(result); } display(3,9,add); I am trying to run above callback function code , I am not get any output on console.
Hi sir, thank you so much for this class and we need one more session on javascript theory and coding. your classes are very helpful to understand the concept easily.
45:48 I go through various video when I was learning c++, java(best in OOPS concept) and also JavaScript class was confusing for me but today you naild it and clear class concept, Thank you!
Heartfull thanks for your all videos. In Javascript interview videos Top 25 JavaScript Interview Questions for Beginners In callback function question What are CallBack function? V IMP your example explanation function display(x,y,operation){ var result = operation (x,y) ; console.log(result); } display(3,9,add); I am trying to run above callback function code , I got error ReferenceError: add is not defined.
i'm little bit confused about javascript learning for the fast learing 1. learn interview questions first and later learn basic and advanced concept of javascript 2.learn basic and advanced concepts and later prepare for the interview Questions please suggest best way
This is a really really helpful video, there is no video on TH-cam which covers mostly all concepts in a single video. Thanks a lot for this. Informative, Detailed and Great explanation with examples. Hats off🫡🫡
Wow it's a very good explanation and easy to understand Thank you so much sir.....for creating this type of videos it is very helpful to many of the learners once aging thanks you sir
I bought your course on Udemy (javascript interview)and I can confidently say that it is one of the most comprehensive and thurow courses about js on the web.❤ Keep up the good work Happy
Thanks, you sir, It is a great video, But I have a small request, there should be one more question i.e. Map, filter, and reduce. Because almost every interview I attended, I was asked this.
One of the best video on the internet...Thank you so much for this❤💥. Can you please make videos on the entire javascript course it will be so helpful for beginners.
Happy I very much would love to have a coding session with you someday, this is your first video of yours that I watched and the value you provided is very much worth worth the watch, thank you
at 4:58 when you reassign the value of age from 25 to 30, isn't it just updated in the same slot in memory? Why would it be in a different slot if you are replacing the value? Just looking for clarification. Thanks.
The most important difference between primitive and non - primitive data types is that Primitive Data Types are compared by value while non - primitive data types are compared by their reference.
//BASICS Q) What is javascript? Q) What are data types in javascript? what are primitive data types? Q) What is the difference between primitive and non-primitive data types? Q) What are arrays, functions and objects? Q) What is scope in javascript? Q) What is difference between var, let and const in javascript? Q) What is loop? What are the types of loops in javascript? Q) What is difference between for, while and do while loops? Q) What is difference between for.of and for…in loops in javascript? Q) What is for…each method? Compare it with for…of and for…in loop in javascript? Q) What is the differece bwteen == and === in javascript? //FUNCTIONS Q) What the types of functions in javascript? What are named and anonymous functions? Q) What is function expression in JS? Q) What are callback functions? Q) When to use callback functions in real applications? Q) What is the use of event handling in JS? Q) What is higher order functions? //ADVANCED Q) What are asynchronous operations in JS? Q) What are promises in JS? Q) How to implement promises in JS? Q) When to use promises in real applications? Q) What are classes and objects in JS? Q) What is the purpose of “this” in JS? Q) What is hoisting in JS?
also one thing to mention here, when using a for...in loop on an array in JavaScript, be cautious as it may not iterate in the array order and can include inherited properties, potentially leading to unexpected behavior.
Excellet Sir, I am watching your videos continuly and i feeling very happy to you are sharing the great knowledge and your teaching method is awesome...🙏😊🙏 And we are very blessed because of you are in the youtube and udemy mediums...😊 I don't have the much words to you to express my gratitude..🙏
Really good session .its very help to my intern interview . like wise please post the some importance thing or interview questions about the other full stack technology such as React Node etc.
Very good session. Very well covered js topics. Thank you for your efforts and making it available without any cost. I am referring to all your videos for preparation. Thank you😊
Sir Apki video ne meri bahut help ki. I've cleared SDE interview with help of this video. 14 feb ko joining hai ❤
11:49 - There are a few other differences between var, let and const.
1. Var can be redeclared while let and const cannot be redeclared.
2. Both var and let can be declared without assigning a value while const needs to have a value assigned when you are declaring it.
3. Additionally during JS execution var is "hoisted" therefore all the var variables are first brought to the start of your code by JS and with an undefined value, before it executes your code. Let and const are not "hoisted" in the sense of the word but are instead stored in temporal dead zone (a memory allocated used to store such variables for the time between declaration and initialization).
Yes you are correct
21:37
was a amazing video, But you left some important Question like:- Clouser, Lexic Scope, spread and Rest Operator, Destructring, First class function, Pure and impure Function, function currying, Map filter and reduce, call apply and bind, prototype chaining. Thanks a lot.
Great catch, that is slightly next level and I will cover then soon.
Sir i have completed this mini course for an interview . Thanks❤ sir
All the best @currentstudy
Heartfull thanks for your all videos.
In Javascript interview videos
Top 25 JavaScript Interview Questions for Beginners
In callback function question
What are CallBack function? V IMP
your example explanation
function display(x,y,operation){
var result = operation (x,y) ;
console.log(result);
}
display(3,9,add);
Sorry for for your effort.
I am try to add first line in your code example
const add = (a,b) => a+b;
I got result,
Many many thanks for you. Now i am very very happy,
Very good for my last-minute revision. Even beginners would find it simple to understand. Thank you very much. Sir, you have made me too happy.
You are most welcome @abilashinib
I cracked it sir once again thank you so much 🎉
Very best interview question for preparation.. thnx a lot😊
Lots of respect for your hard work and great content. 🎉
Your voice is very clean it's give me more interest to watch your videos.
Most understood video i ever seen since fro i started learning JavaScript . You make me "Happy" by explaining like this. ❤
Glad you liked it! @puneeths7973
Sir because of you i got a job, such an amazing work you are doing.
It's my pleasure. Congratulations to my friend.
so much easy to perceive and happy to see simple explaination of the hard topics
Glad it helped! @self-taughtlearner6401
Amazing content! I am preparing for interviews and this is very helpful, so precisely explained. Would love to see part2 :)
Thankyou in advance
Thanks Vaishnavi. I am working on part 2 :)
@@interviewhappythanks sir for this video, eagerly waiting for the 2nd part, also can u make one video for the react also!! 🙏🙏
sir sir sir .. thank you so much , love from pakistan..
Thanks and all the best for your career.
Tomorrow is my Interview and this video is very helpful 😊
Thankyou Guru jii
Good Luck
28:33 When callback function is defined and 10 and 5 value is passed along with callback function so how can output be 8.
You are really great teacher. First time adding comments in youtube.
Wow, thank you! Hope I add value in your learning @munaswamyC
Most valuable video for hour before an interview ❤
I am glad you liked it @Dk-hn9or
Heartfull thanks for your all videos.
In Javascript interview videos
Top 25 JavaScript Interview Questions for Beginners
In callback function question
What are CallBack function? V IMP
your example explanation
function display(x,y,operation){
var result = operation (x,y) ;
console.log(result);
}
display(3,9,add);
I am trying to run above callback function code ,
I am not get any output on console.
Amazing sir....pls bring 25 more questions of javascript...it will be really very helpful for us.
Thanks a lot and all the best
Kudos to your teaching skills sir👏👏👏
Thanks Shailaja. All the best for your career.
you really deserve 1M subscriber....from NEPAL
love you Dipesh. All the best for your career.
Fantastic video bruh, never seen such a simplified explanation on JS in TH-cam.
Glad you liked it! @sumanthn.s.1377
This video is amazing! Really helps to sum up what javascript involves.
You are a very good teacher with simplicity of logics that you have shown here.
Please keep it up.
Great Job @Happy.
Thanks. Wish you all the best.
I have learnt many topics from this video 😊😊😊🎉🎉🎉,
im very happy from this.
I was not knowing many things from last 3 years clearly.
Glad to hear that. Thanks for appreciating my efforts . Good words means a lot @appusharu5657
Hi sir, thank you so much for this class and we need one more session on javascript theory and coding. your classes are very helpful to understand the concept easily.
present mood : Happy happy happy 😼😺
Same here ❤
😂😂
vic
Banana cat happi 😺
This comment is everywhere in happy s video
45:48 I go through various video when I was learning c++, java(best in OOPS concept) and also JavaScript class was confusing for me but today you naild it and clear class concept, Thank you!
Heartfull thanks for your all videos.
In Javascript interview videos
Top 25 JavaScript Interview Questions for Beginners
In callback function question
What are CallBack function? V IMP
your example explanation
function display(x,y,operation){
var result = operation (x,y) ;
console.log(result);
}
display(3,9,add);
I am trying to run above callback function code ,
I got error
ReferenceError: add is not defined.
Best Javascript question series ❤
Thank you Happy, this really helped me to quickly revise the concepts.
Requesting the same video on React.
Glad it helped! React already uploaded
Guru kamaal kar diye aap to ❤🎉 Great ❤🎉
i'm little bit confused about javascript learning
for the fast learing
1. learn interview questions first and later learn basic and advanced concept of javascript
2.learn basic and advanced concepts and later prepare for the interview Questions
please suggest best way
This is a really really helpful video, there is no video on TH-cam which covers mostly all concepts in a single video. Thanks a lot for this.
Informative, Detailed and Great explanation with examples. Hats off🫡🫡
You're very welcome! Thanks for appreciating my efforts . @vikaskumar
We need like this essence of javascript videos... ❤❤❤
Will upload soon my friend @harikrishnanpandyan5684
Amazing set of interview questions and answers!! You give us a positive vibe with your smile 😊
Wow it's a very good explanation and easy to understand Thank you so much sir.....for creating this type of videos it is very helpful to many of the learners once aging thanks you sir
I bought your course on Udemy (javascript interview)and I can confidently say that it is one of the most comprehensive and thurow courses about js on the web.❤
Keep up the good work Happy
Glad you enjoy it!
So glad I found your channel. You explain everything so clearly!
I'm so glad!
Your explanation is next level 🎉
Thanks a lot 😊@sujatha204
This is THE BEST VIDEO I have watched on youtube considering explanations based on Theory as well as Practical !!❤❤
Glad you think so @beinglearner
Thanks, you sir, It is a great video, But I have a small request, there should be one more question i.e. Map, filter, and reduce. Because almost every interview I attended, I was asked this.
soo much satisfaction after watching full lecture. Fully impressed.
Glad to hear that. Thanks for liking it @johnnyjack2986
Best course of JS I found !
Excellent job with these interview questions, also good luck with your TH-cam channel, you're doing great content, keep it up! 🔥🔥🔥
Thanks so much!@cristiangolu1234
One of the best video on the internet...Thank you so much for this❤💥. Can you please make videos on the entire javascript course it will be so helpful for beginners.
I will try my best @dadasoborge9011
Happy I very much would love to have a coding session with you someday, this is your first video of yours that I watched and the value you provided is very much worth worth the watch, thank you
Welcome aboard!
superb explaination sir i never have seen this type video ❣❣❣❣❣❣❣
Thanks. Glad you liked it. All the best for your career.
You are so good to capture these interview questions.Your explanation skill is also extremely good. thanks for sharing
Glad it was helpful! @jitendra
at 4:58 when you reassign the value of age from 25 to 30, isn't it just updated in the same slot in memory? Why would it be in a different slot if you are replacing the value? Just looking for clarification. Thanks.
variable will be pointing to the new value 30, which will be at different address. That's why num, string are immutable in JS
The most important difference between primitive and non - primitive data types is that
Primitive Data Types are compared by value while non - primitive data types are compared by their reference.
//BASICS
Q) What is javascript?
Q) What are data types in javascript? what are primitive data types?
Q) What is the difference between primitive and non-primitive data types?
Q) What are arrays, functions and objects?
Q) What is scope in javascript?
Q) What is difference between var, let and const in javascript?
Q) What is loop? What are the types of loops in javascript?
Q) What is difference between for, while and do while loops?
Q) What is difference between for.of and for…in loops in javascript?
Q) What is for…each method? Compare it with for…of and for…in loop in javascript?
Q) What is the differece bwteen == and === in javascript?
//FUNCTIONS
Q) What the types of functions in javascript? What are named and anonymous functions?
Q) What is function expression in JS?
Q) What are callback functions?
Q) When to use callback functions in real applications?
Q) What is the use of event handling in JS?
Q) What is higher order functions?
//ADVANCED
Q) What are asynchronous operations in JS?
Q) What are promises in JS?
Q) How to implement promises in JS?
Q) When to use promises in real applications?
Q) What are classes and objects in JS?
Q) What is the purpose of “this” in JS?
Q) What is hoisting in JS?
Excellent video, thank you so much - really helped with my interview prep. I was rusty on the fundamental definitions but not any more, thanks again!
Glad it was helpful!
Sir this video is very useful it has cleared my concepts. Please make a similar video on Java, Html and css also. 👍
Thanks sir for your best wishes. I practiced your all questions. It helped me a lot in revising javascript concept 🙏🙏🙏. Your content was very useful.
My mood right now : HAPPY HAPPY HAPPY
very nicely explained. Thank you
Thanks Ahmed. Glad you liked it. All the best for your career.
also one thing to mention here, when using a for...in loop on an array in JavaScript, be cautious as it may not iterate in the array order and can include inherited properties, potentially leading to unexpected behavior.
Thanks a lot dear sir this video is very helpful for beginners
wc and all the best buddy.
really I learned all the advanced concepts in this video. thanks a lot happy☺
Happy happy happy..... happy happy happy happy Happy
Great short course with clear concepts. Thanks alot for making such a video.
Very clear explained. Thank sir.
You are welcome @nadolaloshala8678
after watching the entire video you deserve my respect'
Thanks Adnan and all the best for your career.
We would love to learn more in depth lectures of related technologies as well😊
Very straightforward, useful and efficient! Thank you!
Glad you enjoyed it!
Very good summarization of the important concepts Really helpful.
Thanks a lot sir! This was really helpful for me as I am preparing for my interviews. God bless and best wishes to you sir ❤
All the best
Tqsm sir i feel I know javascript after watching ur video. 🎉🎉
Great 👍Thanks and Welcome @syedsuhel6164
The content is really great with a nice explanation of each concept. It helped me a lot.
Glad to hear that . Thanks a lot @basukunal89
Excellet Sir, I am watching your videos continuly and i feeling very happy to you are sharing the great knowledge and your teaching method is awesome...🙏😊🙏
And we are very blessed because of you are in the youtube and udemy mediums...😊
I don't have the much words to you to express my gratitude..🙏
Bro, you are a fantastic teacher
Thanks bro and all the best for your career
Thankyou Sir You increase my confidence of js
Welcome . All the best for your career.
good sound and clearity
Thanks and all the best for your career.
YOUR VIDEOS ARE JUST AWESOME and easy ❤
Thank you so much sir.This question are very very important for Interview 🎉🎉❤
Most welcome and Thanks for appreciating @atulsaini7013
very nice video and way of under standing is excellent.
Thanks Arun. Glad you liked it. All the best for your career.
Amazing sir I had search lot of videos but this video is really much helpful keep growing sir ❤❤❤
Thanks Rehman and all the best for your career.
This video is really helpful for quick revision of javaScript concepts for interview. Thanks sir for sharing this video.
You are most welcome
Thank you sir....amazing video and helpful too
Glad you liked it @pranshugupta227
Sir your teaching method is very very good well done sir keep it up and please make videos on all languages like this
Great video deserves a heart❤
Thanks and all the best for your career.
sir your teaching is very nice each and every concept also explain good sir
There is an interview for me tomorrow. Hope this video Helps me...Good Work anyway!!
All the best bro
@@rounakmukherjee1009 thak you very much ❤️❤️❤️
All the best bro. You will crack it.
hey bro, all the best & plz make sure to comment down questions from your interview, it will help viewers
@@MayurPatil-pj2qy sure
Sir please use green arrows for explaining....it will more visible, where the code is pointing to
Noted, I will try to implement this in future.
Lots of respect for your hard work and great content. Thank you Brother
Simple yet amazing explanation 💯
Glad you think so! @vinod
thank you so much sirr, God Bless You... sir , you are the best teacher of JS...
You are most welcome
Salute sir g 😊😊😊😊😊
Really good session .its very help to my intern interview . like wise please post the some importance thing or interview questions about the other full stack technology such as React Node etc.
Very good session. Very well covered js topics. Thank you for your efforts and making it available without any cost. I am referring to all your videos for preparation. Thank you😊
Thanks and welcome @dips
Worth watching sir, please do video on HTML for beginners like non IT background
its really a wonderful .... i always believe in practical..
Sure, soon I will show the practical
this session is very much helpful, to clear deeply our concepts, thanks
You're most welcome@ramghodke8599
Thank you very much sirr..
Now i am cleared regarding basic fundamentals of js after listening this video..
It is useful for me.
Glad you liked it . @chandustrikes2017
Thanks for great knowledge. Your videos are very much useful. Very simple to understand with very clear code snippets.
Your videos are awesome sir please make a video on the JavaScript output series which is asked in the interview
Will try @ abhijeetkamble9305
Contents are so amazing,lots of respect to you.
Thank you so much 😀
Exlent presentation
Thanks man. All the best for your career.