What is functional programming | Easy way 

1. Keep your data and function independent 2. avoid changing state of variables, instead declare others 3. accept function/reference as a param

Functional programming: Remove bloat by adding bloat.

I use OOP

Simple clean clear crisp to the point no bullshitting or beating around the bush appreciate it really for beginners good work keep it up sir

I use C++, so I basically combine the three all together. OOP for the big components, procedural for the rest and sometimes functional.

I have been programming in many different languages since Microsoft DOS 1.0 came out in the early 1980s ... Assembler, Basic, Fortran, Cobol, Pascal, C, C++, Python, etc. My "style" has never changed despite many people bowing down to new programming fads like OOP and FP. In my opinion, the best programmer is one who: 1. Understands the Objective of the task at hand. 2. Writes the program with efficiency as a high priority. 3. Creatively can devise solutions to obstacles encountered. ... Each person may have a different "style" ... Good programming is more of a temperament than a style. Just live and let live.

Came here after the new ongoing JavaScript series. And yes, it was worth coming. Thanks for such a simple explanation :)

Just found this randomly in YT, and the very outline here is spot on! As someone who's working on pure FP for 4 years now, I feel there is a lot more to FP that most people say. There are two parts to FP, one is the concept of purity, and the second part is mathematical abstractions like Functors, Applicatives, Monoids, Monads, Transformers, Type Classes, types vs kinds, compile time row polymorphism etc. This is why there is a very high learning curve to get used to purely functional programming languages like Haskell and PureScript. Also in pure FP languages, a 'function' must take a single input and give a single output. And when a function is guaranteed to give the same output everytime it is called with same input, it is called as a pure function. These are often mathematical expressions. But we can't always guarantee that, like in case of writing to a file for example. Those are impure functions. Since calling an impure function makes the caller impure too, we wrap the function along with the required context in a box. Now this box, is called as a monad. Also, this is why pure FP languages doesn't allow you to declare variables directly, unless you keep them in a State monad. Linking one of the best articles I've ever read on pure FP if in case anyone finds it interesting: adit.io/posts/2013-04-17-functors,_applicatives,_and_monads_in_pictures.html Thanks for speaking about FP, Hitesh!

A difficult problem exist for beginners No one: Literally no one: Hitesh Sir: I will make it ridiculously easy

Functional programming is when you are shoveling variables on and off the stack that could happily live on the heap without using any extra cycles and any extra memory.

so basically its just racism towards void functions and non constant variables

I've only known procedural and OO programming, so I tried to learn Clojure last year. Epic failure. I hated all the parentheses and inside-out logic, but also just couldn't grasp functional thinking. I'm now trying to learn Erlang, which is a lot less opaque but I still struggle with thinking functionally. Languages like this reduce side effects, but side effects are exactly what we need. Programs exist to do things, and to do things requires interacting with the outside world, taking input, producing output, tracking and updating state information, storing and retrieving data, etc. I still can't figure out how functional programming gets anything done. Something as simple as creating and updating a counter. How can you track state if variables are immutable? It just doesn't make any sense to me.

2.5 minutes in & i haven't learned a thing. disliked

That was helpful. I am a little fuzzy about the last principle. Maybe you can elaborate a bit more later

Hey Hitesh, i follow a lot of courses online from various persons just to update myself, and i have to say that you sir are the best until now!!! You cover so many things that others avoid, which they shouldn't because these concepts are the most important to know about, to really understand how programming works. I will for sure advice any newbie out there to follow you!!! Ps. this is the first and only review i ever gave to anybody, just because you really impressed me!!! Keep up with the good work you're doing!!! I really hope all this gives you all the merit you diserve.

Please tell me what theme were you using in vscode

No idea, "it just works. "Way of programming.

At 7:45 you said it should be able to store functions into any variable. Does that mean variable to store return value from the function with the same type?

OOP and FP together

Old fart here. Some background in structured programming and JSP. Thank you for this concise explanation of the gist of it all. I was looking for functional ideas to incorporate in my normal programming. Other videos always use F# or extra frameworks, that clutter the presentation. An elaboration on point 3 would be appreciated. Point 4 is obvious:)

This is a poor presentation on functional programming. Everything done in this video can be done in JavaScript as it is. There's much more to functional languages than this video says.

Disagree with the main point of this video, I think most people still be confused after this video, different style of writing code is superficial level understand of FP or least thing engineers need to concern about. The major difference of Functional Programming(FP) from OO: 1) Side Effect caused by changing state(external dependency like viable), so less errors when building large system due to state changes. (pure function means the return will only rely on inputs, so its more reliable and more stable, less bugs) inheritance and

Another note: the way you pronounce beginners is NOT 'BEG-ners" your emphasis is landing on the wrong place. It should be pronounced as "Bih-Gih-NERS" should be THREE clear syllables, if you put your hand on your mouth and pronounce it you should feel THREE separate clear bursts of air. Thank you hope that helps, I only focus on words that you as a RU-vidr will be saying quite often so it's worth correcting. Thank you

08:30 this transition effect is Awesome. Reminds me about Mr. Robot

it amazes me how someone can use the word "constant" and "variable" when referencing the same thing, they are complete opposites, "variable" meaning it can change, "Constant" meaning it can not change. it is 2 English words that have been used in programming to describe what they do with the values stored in them, as in 1 changes values and the other doesn't.

Main work in mainstream gd, unreal engine.... anyway unreal uses c++ as its programming language and most work is o.o. damn the pointers we have to use in every freaking line

Tbh this feels extremely wasteful to me. Instead of appending a node to a list, I would need to create a new list that is a copy of the old with one extra node? This seems to trade off O(1) space and time complexity for O(n) space+time. Just so we don’t have to keep track of something changing? What’s so bad about changing a reference to an outside variable? Idk. Programming isn’t just math. It’s programming. I try to limit mutability too, but this seems a bit overkill to me.

You explain all the elements of functional programming, but not how to apply them. Kinda useless.

So, This video gave a rough idea of functional programming. This is not sufficient to understand all aspects. When we understand practical aspects of it by using some real life example then only it becomes clear. For academic purpose such videos will suffice but not for concrete understanding.

This, Functional programming is stupid. Declaring a new variable every time it changes? Nope. I'll skip.

Oh wow, I have always programmed in functional style without even knowing it because I am a variable hoarder.

so in other words: everything stays the way it was in C++ oder Python, but let's add some restrictions functional programming is a Scam!

oops say functional:- C# says EXPRESSION TREE and java says ...

I generally use procedural programming at the moment, mostly because gamedev requires code to run on a per frame basis

func add(a, b) {return : a + b; } ... let c = add(1, 2); ... print c;

you are gonna live 45 years more in this Sinner World, thats why you often use 45..

As a Spanish speaker, Nice video, but the song at the end looks a bit off :P.

one two buckle my shoe three four buckle some more 5 6 nike kicks that's so fire 🔥 🔥

So everything that wasn't mentioned here is OOP? Where is the line? Is it the moment I start using arrays?

Hahaha the final song was the best and unexpected. Nice video ! (Chicos recuerden no todo es trabajo la farra es necesaria)

The guy is not clear with his thoughts. His examples are not clear.

I subscribed only for that smooth af transition, made me chuckle, good job and thanks!

I don't get it... To me these principles just look like good practices

Always use 45 because of Rohit Sharma 6:54

You use 45 all the time because your age is 45 and you are concerned about it 😀

first comment on you'r channel other wise don't have a time to comment

Programming + Regueton Latino Outro = Subscribed

Hitesh sir is best in explaining difficult terms and technologies, be it an Api, framework vs library etc. This man will make it easy for you.

Next paradigm, CRUD programming. :P

you are using 45 because you are a HITMAN fan

Thanks for clearing things up for me. I do OOP programming in Free Pascal and use the Lazarus IDE. I have spent the past few days trying to understand what all this "functional programming" fluff is all about. I am gathering it is mostly about style... it is probably kind of how I currently program anyway... maybe. I am still a beginner here but I tend to refactor a lot of my code into functions. So, I am probably already half way doing functional programming even while Free Pascal and Lazarus may not have specific features built in yet for functional programming. (?) I was chatting in the #fpc IRC channel with the pascal developers and it sounds like they may implement some features for this at some point. I am following you here on YT now as you did make a great little video here! Thanks!

sad to say i am still procedural way of programming...

Ive programmed mostly in OO style using C++ & Java. Also in PHP even if the language doesn’t really enforce it. When I started to study Javascript, I always defaulted to the usual way of thinking that kind of limit the full potential of JS. And there’s this kind of weird feeling of uneasiness when I started to read others’ codes that utilize closures because it just feel un-natural to what I used to think in the OO paradigm. And it took some amount of racking my head before I would start to somehow feel I kind of getting it. Hitesh is right, this is actually just a simple concept. The barrier to understanding is not that it’s complicated but has more to do with how our brain works. It has more to do with our mental reflex to hold on to a mental map that’s easier & less taxing to our brain.

Point functional programming use formula f(x) = y = p ≒ x

Eventhough it is understandable that in order to be able to track state, one should redeclare the variable, but that is not a variable anymore, it is a constant :)

Please make video on destructing array and object in JavaScript and how to use with react

So bad. Almost everything wrong.

sir I am a new student my name is prithvi I am 10 years old

Can you also explain the benefits of using FP way

After watching this video I am very sir to refer your courses to my friends and also to me as well , I am seeing you are simplifying thing at very next level

I use both FP and OOP... Kotlin❤️

Functional Programming...

Hi Hitesh, As per the 4th important thing, do I need to press that subscribe button if I have already subscribed you? Asking for a friend, you know.

procedural way to write a program in python

अबे भाई हिंदी में बोला करो यार

😁😁😁😁 informative video

Please make video on topic like clousers , hoisting and event loop's lot asked in Js interviews

First two minutes are unrequired filler.

I am confused on how to do the fourth point.

Very wll explained

I use object oriented so c# and java

I am currently using OOP.

Jajajaja if the ending it's Reggaeton... Why Reggaeton? 😂😂😂

hindi language

Came here from js series. This is just amazing. Thank you!!

I am using functional programming.

ella quiere farra jajajaja. ... great video

Hey hitesh do you develop games I want to do game development in python 🤗

buuuh

I use C and assembly. So procedural.

Hello Sir, Can you please tell us about prototype in JavaScript. How can we write a plug-in by using that?

this guy is so charismatic,

Yo man I'm using Elixir

Next video on OOP please!!

Ha, it seems I've been doing functional programming in my scripts and apps all along... It makes so much more sense to me to pass in data to a universal function, rather than reusing variables in static functions (it's not like servers are running with only kilo/mega-bytes of RAM these days).

the way you're explaining and you said that point no. 4 .. actually it was for subscribing ... I thing point 4 should be a vital point for functional programming ... Amazing ... I love this video ...

Explained very well

what's the app bruf

@hitesh Amazing video! Also just a minor correction, it is grammatically incorrect to say "explain YOU" you should always add some form of connection like "explain TO you" or if speaking about an object then it will be "let me explain IT TO you" thanks for the video and hope you accept my feedback. Thank you :)

Which ide are u using .

object oriented

nothing got clear here

Finally I found man who know to teach others. This is my 7 video contect and there is expert people who know theres stuff but STUPID to teach other people. This indian man is so good at education I give you 5 star. Than you

Object-Oriented Way

I've noticed that programmers tend to explain, and perhaps even understand, things from the ground up. You start with examples and then work towards the general concept. I find this to be annoying and inefficient. In my opinion, it is better to introduce the general concept first and then give an example.

New to programming. But I naturally using functional to code my small projects. I just did it. I didnt even know this was a programming paradigm.

Nice explanation!

Thank you sir....

nicely done sir.

Simple and Crisp