Javascript Interview Questions ( 12 Polyfills ) - Promise(), Memoize(), Bind(), Reduce(), Map() etc🔥

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Javascript Interview Questions on building 12 of the post popular polyfills will be discussed in this video Pollyfills and Output Based Questions for them
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00:00 Intro
00:18 map() polyfill
03:02 filter() polyfill
05:37 reduce() polyfill
08:22 call() polyfill
12:08 apply() polyfill
13:47 bind() polyfill
17:21 once() polyfill
21:08 memoize() polyfill
26:16 promise() polyfill
40:54 promise.all() polyfill
46:29 debounce() polyfill
49:26 throttle() polyfill
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Пікірлер: 37

@RoadsideCoder 3 ай бұрын

Roadside to Dream Job - Frontend Interview Prep Course 🔥🔥 roadsidecoder.com/course-details (50% Discount for limited time)

@shivankar-1756 8 күн бұрын

Awesome work was looking for a video with compilation of all polyfills !!

@MrColins710 3 ай бұрын

the best video, thank you

@manojpathak2500 3 ай бұрын

Great video, for call polyfill, we can delete fn from context object to avoid any modification to the object!

@MathsWithSatyamPandey 3 ай бұрын

Amazing👍 bhaiya ❤

@bharatnamdev6169 3 ай бұрын

Greate video to learn js concepts👍🏻

@Kamal-216 3 ай бұрын

You did a great job, thanks for uploading Bro 🤝

@RoadsideCoder 3 ай бұрын

Thanks!

@wasimrafik3535 3 ай бұрын

wow what a great video

@046_dikshit4 2 ай бұрын

From where you learnt js, react ..web dev basically ?

@nitingadariya4318 3 ай бұрын

Thank you for uploading polyfill video & prototype video will also helpful ❤

@RoadsideCoder 3 ай бұрын

Prototype video here - roadsidecoder.com/course-details

@FaheemKhan-lt5fe Ай бұрын

@8:17 The polyfill for reduce will fail in some scenarios. For example, suppose we have an array nums = [1,2,0,13], we want to calculate the product of all the numbers so we do nums.myReduce((acc,curr) => acc*curr, 1 ) which will give result as 13 instead of 0. This is happening because we check if accumulator is a falsy value ( ternary operator at line 10 ), and hence assign the current index element to the accumulator. This should only be done for index===0.

@rajkishan3690 Ай бұрын

Right, reduce polyfill is not correct.

@parthgoswami3221 6 күн бұрын

yea true

@SohailKhan-cx9gb 3 ай бұрын

Bro ye video hi chaiye thi interview me yhi pucha jata h plz make one for reactjs all the polyfills like all hooks custom hooks, high order, fetch etc

@RoadsideCoder 2 ай бұрын

more videos here - roadsidecoder.com/course-details

@manojpaithane5704 2 ай бұрын

@@RoadsideCoder 😆

@tanvirhasan5901 2 ай бұрын

bro, make video on text suggestion after cursor and top of the input, which data is coming from json file. and this is similar to bing copilot

@yashsolanki069 3 ай бұрын

I'm confused why these methods are being referred as polyfills?

@DebopriyoBasu 3 ай бұрын

I was just studying about polyfills and you got a video. You read minds or what 😂

@RoadsideCoder 3 ай бұрын

Yes 😎

@ajiteshmishra0005 2 ай бұрын

for(var i = 1; i { console.log(i); }, 1200); } Output is 4 4 4 & for(let i = 1; i { console.log(i); }, 1200); } Output is 1 2 3 Why??

@NatarajPatil 2 ай бұрын

Because var is function scoped and let is block scoped. When you use a var, it points to same reference i.e after a loop it prints current value which is 4, in case of let, it creates a different reference every time and points to that new value

@mickey-bz5cf 16 күн бұрын

Is it necessary for freshers

@rishiraj2548 3 ай бұрын

👍👍

@Shariq26 3 ай бұрын

Bhai tm yaar cars24 ka interview diye the… I'm following you since last two year and was preparing accordingly and I successfully got the interview from Cars24 and the interview was good except the question to create polyfill for "groupBy". I was having no idea about the purpose of "groupBy" and how it is used in javaScript. You are making good content and it was my bad luck to get such question😅.

@RoadsideCoder 3 ай бұрын

... ke bad ki line smjh aai bro 👀

@vimalkumar-zz6pn 2 ай бұрын

Bhai kya likhna chah rahe ho?

@Shariq26 2 ай бұрын

@@RoadsideCoder Edited my comment brother