Higher-Order Functions ft. Functional Programming | Namaste JavaScript Ep. 18

Functional Programming is powered by Higher-Order Functions in JavaScript. And all this is possible because functions are first-class citizens in JS. This episode covers everything about Higher-Order functions and how they can be leveraged to do functional programming. ❤️
In this episode, we will also write a Polyfill for the famous map function. And not just this, we will also see what MISTAKE developers do in a Coding Interview and how you can avoid those mistakes. I'll take code examples and show you how to write optimized code in the Coding Round and impress the interviewer! 🔥
The only request is to watch this Episode of Namaste JavaScript with full attention. 🙏
My tech gear I use every day - google.peek.link/2pba
00:00 - Introduction
00:34 - What is Higher Order Functions?
00:57 - Code demonstration of Higher-Order Function
01:48 - Introduction to Functional Programming
06:20 - Mistakes people make in a Coding Interview
07:06 - DRY Principle - Don't Repeat Yourself
07:56 - How to optimize our code
14:07 - Beauty of Functional Programming
16:24 - Pollyfil for map function in JavaScript
21:51 - Recap of the episode
22:47 - Teaser of the Next Video
23:25 - Thank you for watching Namaste JavaScript 🙏
Support this video series, NOT BY MONEY, but by sharing it with your friends. 🙏
I'll give my best to come up with great content and everything absolutely for free on KZbin. 😊
If you are active on Social Media,
please give a shoutout to Namaste JavaScript and help me reach more people. 🙏
Cheers,
Akshay Saini
akshaysaini.in
Would love to Stay Connected with you ❤️
LinkedIn - / akshaymarch7
Instagram - / akshaymarch7
Twitter - / akshaymarch7
Facebook - / akshaymarch7
#NamasteJS #AkshaySaini

[@subrahmanyakm4859]

You know what, everytime once I complete the video of yours,I feel like I'm a super human 👽. Lots of information, lots of knowledge.. ♥️🙏

[@akshaymarch7]

Being a teacher, this is the best feeling in the world. ❤️ I feel so happy and grateful when I read comments where people say that they actually got knowledge from the videos. Thank you so much for your beautiful comment, made my day! ❤️

[@balajiravi9259]

Yes 200% correct

[@keshav929]

+1

[@divyanshushukla8615]

Same here bro

[@poomarimurugan5762]

@@akshaymarch7 Why can you go as a teacher in any schools or colleges?❤️❤️. You are teaching method is very good.

[@jagrutsharma9150]

Things learned: 1. Follow DRY(Don't Repeat Yourself) principle while coding. 2. Use function to stop writing repeating line of codes. 3. Function that takes another function as argument(callback function) is known as Higher order functions. 4. It is this ability that function can be stored, passed and returned, they are called first class citizens. 5. If we use Array.property.function-name. This function is accessible to any array in your code.

[@yogeshpandey730]

Small correction: at place of Array.property it should be Array.prototype.function-name

[@utkarsh_katiyar]

Async/Await Promises This are the topics, I would love to watch on this playlist.

[@29rohitkumar01]

And promise should have it's own series. 😄

[@pranjalrathod8556]

Await, He is synchronously working on it! and he has already Promised it ❤

[@bharatjain6930]

HUGE ++++++++++

[@RupeshMayekarx26]

big 🤟 from me also

[@universal4334]

Yup these are the big one's

[@piyushkeshari6266]

*For someone who got confused:* First-class functions are JavaScript functions that can behave like variables. They can also be passed as arguments to higher-order functions. Higher-order functions are functions that return a function or take in a function as an argument.

[@aiyanfaras8389]

Thanks! I literally had this doubt.

[@ajaybedre4199]

Then what are call back functions? Can you differentiate between first class function and call back functions?

[@anils9747]

First Class Function: In JS function is treated as value, the value is passed to OTHER FUNCTIONS as an argument is called First Class Function. The main intention of First Class function is to be used in other functions, not intended to be called directly. Higher Order Function: The OTHER FUNCTIONS which takes function as an ARGUMENT are called Higher Order Function. Callback Function: In Higher Order Function passed ARGUMENT function is called callback Function.

[@karishmasoni1249]

I am super confused after watching this video. Unable to differentiate between FIRST Class Functions and HOF

[@akshaymarch7]

Next Episode: *map, filter & reduce* - kzbin.info/www/bejne/sJXTYa2opbCtf6c After watching this video, do let me know in the comment, How was the video? I read all the comments, would love your feedback! ❤️

[@fayazansari2827]

Finally wait is over, I got goosebumps after watching your premiere of this video😣❤️❤️

[@preetikohli2901]

bhaiya plz iterators and generators pe bhi video bnao

[@SachinKumar-qv8fj]

are wah wah wah finally

[@vamsi11358]

bro please do react videos as well

[@AmanSingh-ty8nc]

Such a great teacher man ❤️

[@sailyjadhav1111]

Hello Akshay, this was a superb comeback!! :D Understood the concept of functional programming. Could you please create videos on 'This' keyword, Promise, Async Await, es6 features of JS?

[@JudoboyAlex]

Finally, one of the best JS teacher is back! Thank you for this lesson!

[@AshutoshKumar-oo3hc]

I am a Java developer and still watch his videos, that's the level of quality this guy delivers. Keep up the good work bro! 👍🔥👍🔥

[@agustinlavia]

I checked this video out half a year ago when I was decided to start programming again. I watched this video several times and each time I felt like I no longer had it me to understand this stuff. I just couldn't see the beauty of this. I'm coming back after practicing and coding in real projects and holy fuck, I can see the beauty of it now. Thank you so much Akshay. Namaste 🙏

[@mohamedyusufkhan216]

Akshay really thanks a lot man,I feel like get some extra energy after watching ur videos.Now I have lot of hope on me to face interviews

[@souvikpanda7797]

The energy you put in on each video that's amazing, great resource to learn js waiting for further videos in this series

[@samarthbillore9485]

The difference between you and any other tutorials out there is you give the proper implementation of whatever you teach. Simply amazing to see how to apply all the theory in real

[@hrishikeshmallick3508]

Akshay Saini: You waited! We: Of Course

[@akshaymarch7]

I also missed you a lot! ❤️

[@hrishikeshmallick3508]

We too bhaiya❤️!!

[@tautikagrahari489]

bhaiya any idea ?...is the couse finished?

[@pankajjangra7]

Waah Bhai...Moj krdi🔥😍 Aakhir intzaar khatam hua. Love you Akshay bhai ❤️

[@BharatiSubramanian99217]

No words, Akshay! Your love and enthusiasm for the language is just infectious! You're a wonderful teacher. God bless! :D

[@mayanksahu6486]

It is awesome how you practically showing the reuseablity and other factors of functional programming rather than just telling the basic points and advantages of it. Love and Respect Sir.

[@vikasthakur360]

True Happiness is when Akshay bhaiya uploads new episode of Namaste Javascript❤❤❤❤❤❤❤❤❤❤

[@pranjalrathod2158]

Watching him growing feels like a personal achievement! Much love Man❣️

[@akshaymarch7]

This channel is nothing without you brother and all the achievements of this channel are equally yours as well! ❤️

[@vishalkaushal4311]

Oh man. I had to rewatch it twice to even start understanding. Hats off to your insights. You bring content and ask questions which I didn't even know existed. Thanks

[@sanjaykumawat5715]

Thank you Akshay! So engaging and crystal clear that watching this, feels like 24 minutes completed in 2.4 minutes. Namaste JavaScript is best!

[@3208nandu]

Bhai -- Java script mai shor machega.....If you teach like this then there would be only JS Developer . Excellent and practical way of teaching . I know you take lot of effort to just create this 24 min of video. Hats off . Waiting for your Map, Reduce and filter video.

[@bharanishkumar465]

The day I completed watching other videos in the playlist new video is out in the series, lucky I can go with the flow. Akshay, you made me fall in love with JavaScript and your way of explanation of each and every concept is crystal clear 🙏

[@akshaymarch7]

My mission was to make you fall in love with JavaScript. So happy to see that happening! 🤩 Don't worry, get to fall even more now. ❤️ And don't forget to share the videos with your friends and colleagues. Let's grow together! 😇

[@bharanishkumar465]

@@akshaymarch7 Excited!!❤️

[@sandeepraj7443]

@@akshaymarch7 You are already Succeed ❤️

[@sirishadasika5767]

I have changed my expertise from support to front end and i was struggling to understand the concepts. Your tutorials are such a relief! You are the best teacher i could ever find in any platform. Thank you for everything you do !:)🙏

[@bhuvanraj8522]

your energy and enthusiasm to teach is unmatchable! Better than any paid courses out there! Thanks a ton for taking out time and making these videos and helping people :)

[@shinobiwolf8133]

The part that Akshay bhaiya is saying the previous lectures as episodes "HE MEANS IT", they are not just lectures , its a F**king web series "NAMASTE JS" 💖

[@de-codr8814]

Waiting for this for a long time 😁 , what a relief 🙏

[@Shivam-sl4sp]

Man you really put in some work in teaching. I can see in you eyes how much you are enjoying explaining and that is why it comes out great. absolutely phenomenal job and thank you truly.

[@charanraj3891]

The only times I binge watched something at a stretch from morning till late night are when I watched Breaking Bad , GOT and Namaste ReactJs and Namaste Javascript, not only you explain everything in depth but you also teach stuff in an engaging manner that keeps the listener glued to the screen as if they're watching a very interesting Movie or TV series

[@amitgaikwad3120]

What a Comeback 🙌. This video made me feel like return of Batman in Gotham City. " The Namaste JavaScript Returns ".

[@akshaymarch7]

Hahaha 😂

[@harshabs3666]

Promises, async, await, ajax, json, please cover these concepts ⏳.

[@yashgarg9458]

yes , pls cover these

[@adinaizhamangulova8705]

Your videos gave me confidence in becoming a js developer!SO much DEPTH and CLARITY over there!Thanksss

[@29rohitkumar01]

The way you have explained it via example, it will help people not just learn the concept but I am sure they will be able to relate with the actual usecase in their ongoing projects. I hope everyone learn these not just from interview perspective but also try to include these practices in their codebases. Let's keep learning via these awesome videos.

[@WestcolColombia_]

The speed you use to explain is perfect, you don't need to be faster explaining, that way it's really beautiful, and also, this topic took me a while to understand it, but I watched the video 3 times until I understood the topic, now I write code like that, every day, to make a habit and in case of any interview to be able to surprise the Interviewer hahaha, thanks so much, I didn't like JavaScript that much, and now I wake at 5:50 am to watch your videos and I finish at 10: pm or more, because you teach really good that this becomes addictive 🥰🏆🎉, you're definitely a Master, Very intelligent gu.

[@akshaymarch7]

❤️

[@manu-ty7gr]

Thanks for coming back after a long time.. I was waiting like a Shabari😀🙏🙏

[@akshaymarch7]

Ye thoda jyada ho gaya ab! 😅

[@vijaypatneedi]

@@akshaymarch7 nahi, that's true.

[@ektajaiswal12]

Man oh man I just loved it. Thanks a million. I implemented functional programming first time today because of you. Being a fullstack developer it becomes really a pain to remember everything but you made my life simple. Much love❤️❤️❤️

[@jayjani740]

Liked that you included how to create Polyfills as an additional part (as map, filter, reduce is also an example of HOF) in this video.

[@ankursinha7635]

Some videos on web security. You've helped me fell in love with JS, which helped me bag 18 LPA offer. Thank you for such wonderful content.

[@akshaymarch7]

Congratulations, Ankur. 👏 Aag Laga di aapne 🔥🔥

[@divvagg5616]

Hello . Can you guide me how to apply for react developer jobs?

[@anantsingh9456]

@@divvagg5616 search on indeed or linkedin

[@shahpragnesh]

Async/Await, Promises and Node.js Architecture differences if any means Node.js fundamentals

[@keerthanagadepalli3787]

You are back with a bang! Loved all your videos. Truly fell in love with JS. Can you make a playlist on React as well? Thanks for helping by teaching us the beauty of JS

[@srijan406]

I Have started watching your video a few days ago and have continued watching since then...now the main reason being the way you explain. In most of the videos being the logic first through whiteboard and then via code with a basic example and then you explain how to refactor codes make it better and that's the beauty of it i.e. covering the basic first making sure we understand through examples and then diving into code and then to advance a bit.....really liked your videos.

[@abhinavmehta1010]

Bhagwan un sabki madad kre Jinki Interview Akshay bhai le re honge.

[@VideO__HuB]

😅

[@nktechofficial]

100k is comming soon sir advanced congrats 😋

[@theotherme9965]

15:00 I write code in this way where, I pass a string (area, circumference, diameter) along with radius and use 'if' condition (for the string passed) inside 'for' loop and have all logic there. At a time only specific piece of code. @akshay is there any drawback with my approach?

[@sajedshaikh9646]

Thanks a lot Akshay for making this playlist. So much information explained in simpler way with real time code examples!

[@k.ashutoshbaitharu3964]

Honestly, learnt a lot about JS from this course. I know there's still a lot to learn but this course gives in-depth knowledge on how things work behind the scene which I think is absolutely necessary!

[@mituladroja758]

Thank you for this lesson, currently functional programming is most important. Could you please cover below topic in this series as well 1) Pure Function 2) Function Composition 3) Point free Functional Programming 4) SOLID principles

[@akshaymarch7]

Noted!

[@shinobiwolf8133]

Netflix is soon going to adopt Namaste JS 💔💔💔

[@akshaymarch7]

Namaste JavaScript will always be FREE for viewers, won't agree even if Netflix wants to adopt it. 😌

[@shinobiwolf8133]

@@akshaymarch7 Happy to hear😁😁.Can't thank you enough for the vids 🙇🙇🙇🙇🙇

[@sonalikulkarni8778]

@@akshaymarch7 you are great Akshay 🔥

[@himakshiaggarwal6487]

The best notification I've received in a long time!! Welcome Back!!! :) Just love your videos and they've helped me in understanding the concepts well and getting a new job! Thank you Akshay for this amazing series!

[@yashkhatwani3198]

A function which takes another function as an input or returns a function from itself is called *higher order function* A function which is passed into higher order function is called *callback function*

[@deepapandey849]

Loved how beautifully you explained these so-called complicated(not anymore) concepts 😎😎

[@rajyalakshmiallumalla8866]

Happy to see you after a long time Akahay :-) . Would like to watch all ES6 features ASAP along with all the important uncovered topics of JS as u cover everytime everything and explain it very clearly. May God bless you for sharing such an excellent knowledge to others for free.

[@milanvala7940]

video title for one topic, teachs multiple topics.. huge respect.

[@madhuppandey7918]

I started to watch it for HOCs but landed up understanding more about the Array.prototypes as well. Thanks Akshay. Very well compiled video.

[@rahulyadav-xn5mt]

In this video, I love where you use mind and reduce the use redundancy by making proper callbacks.

[@sahilpuri9545]

Amazing job at explaining complex concepts so easily with examples :). Waiting for promises and async/await videos !

[@39PlYR]

These videos are so helpful in understanding JavaScript explained like nobody else! Thank you very much for these gems. Hope life is good!

[@kalyannaidu9655]

Super Bro. After completion of video , I am feeling i know every thing .just because of you. Thanks for the videos.

[@chinmayakademane2713]

So happy to see you bro❤️ thanks for this higher order functions tutorial😍 keep making the videos. waiting for the filter, map, reduce...

[@techstudio2874]

Your explanation is very good. Great ideas & great example to illustrate. There is a lot of knowledge in videos.

[@khushboosaini2785]

I used to check everyday that aaj toh new episode aaya hoga javascript ka.... Thank you so much Akshay sir for the videos☺

[@soumyadeepchatterjee2189]

It is one of the most simple and best understandings of higher-order functions. Thank you, Akshay!

[@shahhussain56]

You gave me super power to understand or feel JavaScript code

[@ellerobertson9058]

Wow, this makes sense now. looked at other resources but you broke it down way better

[@bigsidetech]

Amazing!....explaining higher-order functions while creating a map function is truly mind-blowing 🤯....Thanks Akshay for this awesome javascript tutorial 👏👏👏

[@prachirahangdale7809]

So clear and crisp information about Higher-order functions. Loved it ❤️

[@vipsclassicalboy]

gr8 videos akshay, i m well aware of most of JS Concepts & Coding Principles but I love watching your videos

[@Varun-dh4iy]

Sir, thanks for making my concepts of higher order functions crystal clear through this video . Sir, please also make videos on async await and promises . That will be so helpful.

[@kk261293]

This is great stuff, Just love your videos. I have learned so much from you. How effortlessly one could write polyfill for map. Thanks for such informative content.

[@vijitmishra7810]

Great video!! Really impressive even after 5 years of experience I miss these small things!! Keep going like this!!❤️

[@mohitsachdeva8552]

This is amazing content iss video se itne saare concept clear hoo gaye thanks alot akshay bhaiya

[@arshiyabhasin1667]

Absolutely love your way of teaching these core concepts , was eagerly Waiting for your new video, Thank you for these videos

[@CryPoison]

Woooooooww that "Array.prototype" thing blew my mind. really. All of these things you builded up till now make sense now. I want to finish this series once again another time.

[@shakeebarsalan7030]

Unbelievable excellent. This is how a knowledgeable man helps to other to the whole community. Thank you ❤ very much.

[@venugopalpv823]

The way you told about function programming is super and I got clear understanding about Higher order functions and Array.Prototype in this one video

[@siralone3646]

The best video about High order functions, thanks!!

[@jaxsriv1052]

I am now appearing for the interviews and before ever interview I revisit the playlist and believe me everytime I learn something new and my implementation power gets better.

[@abhishekvishwakarma9045]

Few days back I watched your cors and Prototype inheritance video now that helped me to understand this, great as always welcome back sir 🔥🔥

[@nasibmiddya4450]

Ur awesome smile says, we can get more knowledge from u.Thank u so much

[@shouvikmandal8926]

Now I am started to understand functional programming and higher-order functions. Thank you Sir

[@debashish538]

Everytime I watch your videos I get glued to it till the end. Nice way to explaining

[@jdr2.paradigmabiblico128]

Simply fabulous, fabulous. The best explanation, ever

[@himanshuaggarwal8415]

Through this video I also understand the diff b/w HOF and callback functions, thanks a lot

[@ebatheone9173]

Your look is getting as my JS skills. Better while the series progresses :) Nice hearcut and thanks for your amazingness!!!

[@shrutikarahatekar3069]

Eagerly waiting for the next video. Hope this series never ends!! as there is lot to learn in JavaScript and especially from You...

[@harshitsharma4569]

your way of explaining the concepts is too good and and showing how much important it is was best part 🤯

[@lifewidabi]

Async/Await Promises fetch are the topics, I would love to watch on this playlist.

[@shivaprasadgurram]

The boss is back, I admire you for the way you are teaching and making everyone to fall in love with JavaScript. Kudos to you boss.

[@KR-ez7mf]

Yay!!😀 You're back! Keep rocking 👏 Thank you for all the videos❤️

[@NitishKumar-jq2hj]

Thank you so much for this type of content and for making it available for free! Waiting for more videos. More power to you 🙌😊

[@roushansingh8904]

I started to see map() function video , where you referred to see this video , and now you recommend to see your video on prototype . Its becoming similar to recursion .It feels tedious but at the same time could not resist myself from from seeing the recommended video as they are so informative and well explained..😊😊😊

[@krishnayallapanthula]

Incredible explanation of the functional programming. You bought the new dimension to the teaching javascript. Simply outstanding video. We all thankful to you Akshay.

[@prasadguru96]

Was always confused about .map(), but after watching this video, I think I will never forget now. Thanks Akshay. You don't know, how many lives you are changing.

[@rpawankumar]

your explanation is super duper great bro.. no one in youtube explains so well.... please cover other topics also..like angular

[@ManishRajlani]

Mind is blown away ❤ after watching this. Thanks alot @Akshay.

[@VikiSangani]

Excellent explanation. I was eagerly waiting for your videos to learn JS in depth in a simple way. Requesting you not to take break🙏 and cover rest of the topic like Promises, Async/Await etc.

[@theSoftwareWife]

Simple and to the point. Even though I know this concept, it's always better to hear other perspectives.

[@sowjanyam2587]

Thank you akshay!! for this video, I liked the most when small pieces of functions area. diameter, circumference are created.

[@chamaldezilva]

You deserve more and more subscribers, likes ❤️ really love the way you teach and I'm a new subscriber ❤️ keep it up bro!

[@goat3760]

your explanation is on the next level i understood every detail.... please can you make a video about the this keyword

[@rammondal8147]

This episode is awesome 🔥 Eagerly waiting for the episode on map, filter and reduce ❤️

[@shashiverma6219]

This is the first video I watched of yours, I think I should start the playlist.. great content bro.👍👍