Objects in depth in javascript in hindi | chai aur
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- Опубліковано 23 кві 2023
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#javascript #hindi
Sara code yaha milta h
github.com/hiteshchoudhary/
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hitesh.ai/discord
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/ hiteshchoudharyofficial - Наука та технологія
@1:13 objects intro
@7:20 object key using symbol datatype
@9:30 adv.
@11:00 freezer( ) method in object
@12:00 symbol snip again
Sir bundle of thanks, yahan tk pohnch kar mujhe wakeyhi lag ra hey k ye course bohat keemti hey, is sey pehley me 2 bar JS ko doosrey mentors sey bhi kar chuka hun, ab third time aapse seekh raha hun, yahan aa kar mujhe aik bat ki zroor realization hui hey, wo ye k ab me ye dekhta hun k jis mentor sey me seekh raha hun, usey khud ko JS ka kitna pata hey, me sabhi mentor ki izzat karta hun, lakin in depth kabhi na kabhi student k dil esa phase zroor ata hey k wo critical way me sochney lagta hey, aik to aapkey teaching style bohat unique hey, or friendly hey, secondly aap apni tarf sey bharpoor try kartey hen k me jo bat samjha raha hun, wo student k dimagh me literally ghuss jaey.
The uniqueness of your course, you not only teach the topic but also learn the exact use of it.🥰
Iss lecture mein jo sir ne concepts bataaye hain woh sach mein in depth hain. Notes banaake aur ache se samajh aata hai. This series is lit.
finally found a great teacher on youtube , really really helpful
@15:15 hello sir,undefined is the return value of the function greeting( ).
Q k humne dar-asal value ko print karwaya hai na k return, to jab kuch b return nahi hoga... to by default undifined he return hoga.
love you sir..ye Internet ki best series hai JS ki..Jitna aap deep explain kr rahe hain utna kisi ne ni kia hai Yt pr...very thanks Sir
hitesh sir be like raat 12:30 baje hai to best object tutorial to bana lu
omg i've seen such a high quality oontent like this on yt , i'm just getting jealous that many people can have access to this video and they'll be getting more info....damnn bro,this playlist is lit
in greeting & greetingTwo functions you log messages to the console but don't return anything, so they implicitly return undefined as an output after every console. But when we use return keyword in functions instead of console.log it will not output 'undefined'.
Why he didn't get it?
true, because whenever we are using { } we have to explicitly write return whereas when simply using ( ) we do do not need to write it
Thank you sir ji main thoda research kiya ki UA-cam pr available js ki jyadatar playlisto pr really sir ji sabse alak hai aapki playlist concept ko apne alak hi tarike se bataya hai bahut bahut dhanyavad sir ji
Thanks! Awesome way of explanation man. Damn
Sir woh last mein undefined isliye araha hai kyuki function Console log kar raha hai na ki kuch return kar raha hai or an function ko console log mein print karwa rahe hai toh isliye undefined araha hai
sir the undefined value that is being printed on the screen is bcoz u r printing the return of the function which is not defined
console.log(JsUser.greeting()) is wrong instead use JsUser.greeting() for calling the function
thank you
"Excellent tutorial, covers JavaScript objects' depths neatly! Loved the chai tea and code puns. #JavaScript"
Note: This comment is written in Hindi script, which would look like - "पर excellant ट्यूटोरियल है, सक्षम JavaScript objects की depths निग्रानी करता है! Chai tea और code शब्दों से प्यार लगाया। #JavaScript"
Best video on internet
Shandar lecture
Keep making such an amazing video lecture for us
These lectures are very helpful for us
10:00
The syntax of declaring a symbol inside object still does not seem to be correct because upon
console.log(typeof JsUser[mySym]);
// It returns *string* , whereas ideally it should return Symbol as its dataType.
Same doubt, have you got any answer ?
@@hobabu7066 The Explaination was quite confusing.
However following code prints type of symbol:
// Objects
let mysymbol = Symbol('Key1');
let myobj = {
name: "Shaharyar Ansari",
id: 1232,
[mysymbol] : mysymbol
}
console.log(typeof myobj[mysymbol]);
The only reason for using Square brackets inside an object is to assign a dynamic key.
Forexample:
let key = 'dynamicKey';
let value = 'This is a dynamic value';
let obj = {
[key]: value
};
console.log(obj); // Output: { dynamicKey: 'This is a dynamic value' }
i think jaldbazi mei sir bhool gye
@@shaharyaransari4887 thanks man it woked
There are no words for your teaching skill and knowledge sir.
The best series on the internet !
The full name has space in between and thus it cannot be acessed using . Notation but if there is no space and if we type the key in string expression like 'fullname' it can be accesed using . Notation
right bro
@14:51 "undefined" is appearing because the function is not returning anything, and you have called the function inside the console.
Exactly
Mene bahut video's dekhi par maja nahi aya apki video dekhta hu to sach me apke video's achhe lagte he aur helpfull he thank you
no doubt sir you are great teacher
This series is very addictive❤
7:02 the issue with the object property "first name" when trying to access it as (object.first name ) is because of space , if the property name was "first" then in that case it is easily accessible as object.first or object["first"] both will work . As any property name is coerced as string
Yes both should work.
THIS SERIES IS SO ADDICTIVE , MY GOD😍😌
*Sir really React complete karney kay baad dekh raha ho concepts ko clear karney kai liyay ab samjh araha hai in depth course ka matlab😃*
same bhai react course complete kia hay or ab ye dekhna start kia or boht maza aaraha
Buhat achy sy apny explain kra Hai,🥰
The reason of undefined is because the greeting function is not returning anything it is just priniting thats why the return type is undefined
understood objects in js very well.....................................
thank you!
great teacher !
14:51 undefined is bcz in greeting function we already had console.log('message') ...but while calling the function you used console.log(greeting()) again. due to to console.log() we are getting an undefined. Just write gretting() and there will be no undefined.
same goes for 17:05
This is literally The best javascript playlist on UA-cam.
Hope the way you guide the students will truly bring a revolution.
Lots of love Sir😍❤❤
his eyes have that dark thing around them indicating the tiredness. BTW I am loving your videos and I am actually a 9th grade student and am able to understand almost everything. This course is better than any other course I've seen on YT. Thank You Sir.
Wow [ ] can take my job 😂😂 I better need to be ready for Interview Sir. It’s creating fear and confidence at the same time
I was waiting this type of video
Excellent Work Done bro
I've been fortunate to have incredible guidance on my journey to becoming a full-stack programmer. Learning with the help of this amazing tutorial, I've been steadily mastering JavaScript, and it's been an enlightening experience. A big thank you to my learning companion for being there every step of the way.
hh
kkk
@7:02 you can also access by dot method
let a={ "name":"ahmed",
'age':20}
console.log(a.name) // ahmed
console.log(a[name]) // ahmed
conclusion:
if you give "key" in string or without string it wiill access by both two methods
15:00 , you are using console.log(console.log()) thing thats why undefined coming, just like python when you do print(print("Hi")), it gives hi then none. print statement inside print statement.
i don't know if my logic is correct but i can think of this only right now.
Bilkul sahi he.
in my case also there is 12:29 am haha,,, you are doing great sir, I eagerly await the backend series.
Kya din, kya raat. Agr mza aa rha to kaam krenge hi
sir the best thing is that we never get bored by your videos,, main ny bht sary courses starrt kiye is sy phly but end kbhi nahi hua koi bhi , but jb sy apka js course dekhna start kiya hai aj 35th video hai within one week,almost 4-6 hours+ daily screen k samny gzr jaty hain time ka pta nahi chlta ,smj b aa jati or practice b ho jati@@chaiaurcode
'undefined' is shown , because we call the method in console.log(jsUser.greeting()) and we console also in greeting method. It will removed if we directly call method without console. eg; jsUser.greeting()
Sir ji pranam
Thanks for a superb video
Sir I think greeting function giving undefined because of we are printing this function so it expect some value
console.log("=======jsUser.greeting()====",jsUser.greeting());
console.log("=====jsUser.greetingTwo()======",jsUser.greetingTwo());
maza aagaya. thank you so much sir.
undefined @15:10 is due to the fact that console.log print what is returned when so in this case when greeting is used nothing is returned so fun returns undefined which is printed.
Thank you very much sir
@ 14.46 It gives undefined as we did not use return keyword there. If we use return it will not print undefined.
love this playlist
Gold Js Content ON YT . keep Creating more content sir
"Chai aur Code, you've successfully turned me into a JavaScript enthusiast. Your tutorials are gold!"
all the comments solve my residual doubts thank you guys
When u call the function directly instead of console.log - "undefined" doesn''t show on the console.
THANKS A LOT BRO
Very nice js Course ✔✔❤❤❤❤❤❤
@10:09 the methode that you told still shoing that in string even i dicleared it correct way .
same problem
Awesome!!
Great video
Thank you so much bhaiya
Chai aur code main mera swagat hi
Sir , JsUser.greeting(); should be used to call the function and print the value in it. as you console.log(JsUser.greeting()) & console.log(JsUser.greetingTwo()); it want function to return a value and give the answer , thus you get udefined in the browser ( Correct me if i am wrong )
Symbol is new to me 💯
Finally Back ❤
sir is tutorial very help full for me jo me chz ki sekhe oski practise kasie kare for eg aj hum ne object seekh hai?
Thank you sir❤️
Thank you very much sir!!
Awesome 😶🌫
Hello @Hitesh Sir, I think undefined in the last , is coming from console.log(). If we write JsUser.greeting() only then undefined will not show
Great video!
symbol is getting accessed without using square brackets in both the places in 2024 has the syntax for symbol changed ? I guess so as I used typeof() without square brackets it shows that it is a symbol datatype.
@6:55 its giving access by full name by using dot
As of 2024 the part where sir wrote at 6:33 " fullname " : " hitesh choudhary " and while we were trying to access it using the dot method it wasn't accessing but now we can access it using the dot method.✅
Why can't I use the 'this' keyword in an object method with an arrow function?
hitesh sir op
Thankyou for theamazing video sir but at 17:05 ,the output undefined occurrs bcoz in the line no 38 you used console.log to print a function(jsuser.greeting()), function directly excute when it called just by jsuser.greeting(),why we need to write console.log(jsuser.greeting()). i guess you miss that part sir.
10:20 me jo sir , key ka syntax shi kiye hai taki uska type symbol aa jae. Lekin syntax shi krke firse check kiye to type string hi hai.
same problem
hey can anyone explain as Sir said constructor creates singleton objects , But constructors are used to create instances of objects, not specifically singleton objects.I am confused can anyone explain plz
Guru jee ..next video upload kijiye js chapter 49 k baad se ...
We are getting undefined value because of function log,
When we just call the function..it won't be undefined...😊
@17:09 undefined in console becuase at line number 37 and 38 in console log greeting() and greetingTwo function are called a
which do not return anything explicitly and by default "undefined". is returned.
wts the meaning of Array.from() , does it mean we are calling a from() method from Array object
Function execute hone k baad jo "undefined" print ho raha hy wo function ki return value hy. am i right?
at 10:37 if i write console.log(typeof jsUser[mySym]); this then it also give me string type?
Same
the function was showing undefined because you logged a function which was not returning anything, how could you not get this simple thing
im sorry to say sir , but problem , you alwasy said that , you explain in depth , but here in object sometime in vedio you type some syntax but dont explain them
You can't learn objects is just 19 mins...you have to give 1 to 2 week for this... practice
Vdo is only to take an overview of objects
Bro If you want to depth understanding please go search harsith vasisth javascript full length video you will get depth in every thing..
Bhai If you really want to learn JavaScript, you will have to work hard yourself. Read documentations. as sir says in all the lectures.
Because there is no concept of spoon feeding here.
hope all your doubts are cleared.
Objects in javasript....
Thuje objects hee patga nahi tho kya faidha bhai..
OOPSnahi patha hai kya??
Yea you all are glazers he doesn't explain shit
when i am writting jsuser.greeting(); then it simply printing the result but, while writting console.log( jsuser.greeting()); then it printing the result along with undefine. It may due to we are not returning any value and still trying to console.log() .
thank you
Just insane..
sir tell me one thing after using square brackets it still give me type of symbol is string why ???? it only show under the object but if check the sybol type of on console it shows it is string
I was thinking the same.
Hi there, in this lecture we are getting undefined because we are executing a function inside console.log();. By executing JsUser.greeting(); we are printing "Hello JS user". And the execution value of JsUser.greeting() = undefined. Which we are printing by console.log(JsUser.greeting());.
Waiting for a reply. Correct me if I am wrong. Love from Bangladesh 🇧🇩 .
the undefined in the last part was occurring because he was logging the invocation of the function..?
🔥
15:15 We are not returning to print it, we just need to call the function with object name ex: User.greeting();
yeah & the point is that , the function doesn't return any value that is why it is printing undefined
Did not get the "symbol" part. Can anyone please help me understand?!
undefined is coming because the function greeting and greetingtwo is not returning anything and you are printing the output inside console.log(greeting());
When i searched google about singleton , i found out that object literals are singleton ut you are saying they are not can u please clear this doubt
10:31 Sir, to use Symbol as a key, what if we use Map data structure!?
const ob1 = {
name : "Prateek",
age : 30,
"add" : "Prayagraj"
}
console.log(ob1["add"]);
console.log(ob1.add);
I checked today Now both syntax is working.
15:00 maybe it's becuz of the absence of return value
JsUser.greeting = function(){
return "Hello JS user";
}
JsUser.greetingTwo = function(){
return `Hello JS user, ${this.name}`;
}
console.log(JsUser.greeting());
console.log(JsUser.greetingTwo());
OR
function jsUser (name) {
console.log(`Hello JS user, ${name}`)
}
jsUser("Hitesh")
the reason of undefined kyu ki aap ne function me console kiya hai aur execute ke time per bhi aap console kar rhe hai ya to execute ke time console mat kijiye ha to function me se console ko hata ke return kardo
15:09 ye undefined line 34 se aa raha h qki at line 30, function greeting is not returning anything.