25 Mind-Blowing Practice Questions, Master JavaScript, Can You Solve Them All ?

[@kuldeepsinghrathore2327]

20:00 we can also duplicate this array by using spread operators , const duplicate = (arr)=>{ return newArray = [...arr, ...arr] } console.log(duplicate([1, 2, 3])) It will return an new array

[@CreativKun]

can you explain me What return Keyword Do???

[@urbangaming7334]

​@@CreativKunThe return keyword returns the value where the function is called.

[@kaushikbora2728]

i had the same question back then, dont stress it , its pretty simple, when you use return , the data after it can be stored in a variable and can be accessed whenever you want, unlike consolelog , it just prints the data, whereas return stores it@@CreativKun

[@CreativKun]

@@kaushikbora2728 Thanks a lot

[@yurTherapizt]

​@@urbangaming7334in function, if you don't write return, the code will execute but it will execute inside the function only so by returning it, It will go back to where the function was called

[@iamtacky832]

Hi sir please upload for complete javascript course I like your teaching style.

[@soulfulmelodies6676]

I also feel the same, solving complex problems very easily sir✨

[@sujaykumar9780]

It's already there. check their playlist it's LIT🔥

[@Tamatar8263]

1:22:00 we can also use function retrieve(arr, n = 1){ return arr.slice(0,n); }

[@PriyanshuSaini-x2j]

1:12:50 for(i=0;i

[@CartoonWorldHD.]

[@Aakash_Kashyap01]

for (let j = arr.length - 1; j >= 0; j--) { if (arr[j].gender !== 'male') { arr.splice(j, 1); } } -> also we can do like this..

[@MohsinKhan-wv3ep]

1:36:56 for most frequent item of array we can also do it very easily instead of using objects(by your method) use my method : function frequent(arr){ let ans = arr.reduce( (acc,num)=>{ return freq[acc] > freq[num] ? acc : num; }) console.log(ans); } frequent([1,2,3,4,1,4,3,1,3,7,])

[@islamicquiz_34]

Q5 : => 2 method let a = [1,2,3,]; console.log(a += a)

[@amitjadhav750]

very nice video broo ... for question 10 you can use reduce method also ,,,,const string='apple' const result = string.split('').reduce((acc,curr)=>{ if(acc[curr]){ acc[curr]= ++acc[curr]; }else{ acc[curr]=1; } return acc; },{}); console.log(result);

[@Mr.Zeus11]

Array 10: Return data types: check all the corner cases. const returnDataType = (variable) => { if (typeof variable === 'object') { if (Array.isArray(variable)) return 'array'; if (variable === null) return null; return 'object' } return typeof variable; } console.log(returnDataType(function(){}))

[@MihirMenon-c4u]

// shuffle given array function shuffleArray() { let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9]; arr.sort((a, b) => Math.random() - 0.5); console.log(arr); } shuffleArray(); this should also work

[@vipin143kumar]

Hi Harsh brother - ur teaching style n the content u've provided hv been incredibly helpful 2 all of us. The way u explain complex concepts with clarity and enthusiasm truly makes a difference in our understanding.

[@Mr.Zeus11]

Loop: add list of all members in array which is number. (ex: 4 or '4') Optimal Solution: Remember check all the edge cases. let members = [1,'fh','4','foo',5, '6']; const addMembers = members => { let count = 0; members.forEach(member => { if (!isNaN(Number(member))) { count += Number(member); } }) return count; } console.log(addMembers(members));

[@shahidshaikh6109]

the way of teaching is mind blowing really big fan. from pune....

[@yashmalviya9931]

For male question we can do it in single loop for(let i = arr.length-1 ; i >=0; i--){ If condition here }

[@Aakash_Kashyap01]

1:16:56 We Can also clone like this.. function cloneArr(data){ return data.map((e) => e) } console.log(cloneArr([1,2,3,4,5]));

[@anastarique6947]

Shuffle array question answer in more smaller way let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; arr.sort(() => Math.random() - 0.5); console.log(`Shuffled array: ${arr}`);

[@ashatdaiya4328]

And i did like this very small change but I understand better in this way: // shuffle an array const array = [1, 2, 3, 4, 5, 6, 7, 8, 9]; const shuffler = (arr) => { for (let i = arr.length - 1; i > 0; i--) { let rendomIndex = Math.floor(Math.random() * arr.length) let temp = arr[i] arr[i] = arr[rendomIndex] arr[rendomIndex] = temp } return arr } console.log(shuffler(array));

[@Viralmems_xyz]

retrun values.forEach(function(obj, index, arr) { if (obj.gender=== "male") { arr.splice(index, 1); }

[@darkshadow8414]

1:09:24 we can also use let arr=[ {name:"abcd",gender:"male"}, {name:"hrssfd",gender:"female"}, {name:"fsdfsd",gender:"female"} ] for(let i of arr){ if(i.gender !="male"){ continue; }else{ console.log(i) } }

[@sanjaylamba003]

1:36:55 in the question to find most frequent item of array, how to solve it if more than one value occurs most time?

[@harikrishnanpandyan5684]

please replay

[@AkhileshBhatt-d8d]

37th question can be done in a single for loop for(var i=0; i

[@sparshsinha6338]

agar ham ye use karenge to agar do consecutive females aayi to doosra vala object check hi nhi hoga

[@prajuljain3641]

This is very helpful !! Thankyou so much ❤️

[@expertwebexperts]

yes..

[@harikrishnanpandyan5684]

It's literally mind-blowing 🤯🤯🤯🤯... Please one more video same as it is🔥🔥🔥🔥, like a interview problem solving... 😍😍😍

[@s-qc9ns]

I used arr.splice(0) to empty the array. Got to know today that it's can be done by setting array length to 0 also😊

[@srikarravoori124]

your effors are well appreciated. Practising Javascript is the only way to become an good Frontend or even backend developer. But most of the times we learn ReactJs, Anglular any such frontend libraries is of no use. The more you practice, the better you will become.

[@surajgupta5223]

1:02:18 question removing object all object which gender != male another solution let people = [ { name: "John", gender: "Male" }, { name: "deepak", gender: 'undefind'}, { name: "Emma", gender: "Female" }, { name: "Alex", gender: "Male" }, { name: "Sophia", gender: "Female" } ]; for(let i=0; i

[@hellsterkun8764]

Maazaa agaya bhaiyaa! Just had a req, that pls avoid any background music henceforth. It becomes irritating at a certain point

[@Khamzat_07]

For Genders Question (Using Filter First and then For Loop):::::::::::for (var j = 0; j < arr.length; ) { if (arr[j].gender !== 'male') { arr.splice(j, 1); } else { j++; } }

[@sareh8091]

1:06:14 !!! brilliant answer type

[@PriyaSharma-nu8fg]

Very well explained, waiting for next 20 questions 🙌🏻🙌🏻

[@animeisshhit2239]

Thanks bro now I have mastered JavaScript as well as Persian 🛐

[@mr.innovation2693]

sir ye sahi hai question no 3=> let arr=[1,2,3,4,5,6,5,6,7,8] let a=arr.splice(0,arr.length) console.log(arr)

[@pure_soul695]

Aap boht hi acchese simple language me smjhate ho..Loved it❤️❤️

[@puja-z6c]

THANK YOU SO MUCH SIR...... HUGE RESPECT 50% QUESTIONS I DID IT...

[@abdulsamadkarim8249]

function retrive(arr, ele = 1) { if (arr.length >= ele) { console.log(arr.slice(-ele)) }else{ console.log(`${ele} Elements nahi hai Arry me `) } } retrive([1, 2, 3, 4, 5, 6, 7], 1) print last elements

[@MihirMenon-c4u]

function shuffleArray() { let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9]; for (let i=arr.length-1; i>0; i--) { let random = Math.floor(Math.random() * (i+1)); [arr[i], arr[random]] = [arr[random], arr[i]]; } console.log(arr); } shuffleArray(); this could be more easy & effective

[@sumitjhaldiyal9192]

for (let i = 0; i < s.length; i++) { if (s[i].gender!=="male") { s.splice(i,1) i=i-1; } } console.log(s); 1:12:47 for removing male questoin easy approach

[@ravalprince457]

This teach styles and explanation is awesome 😮❤

[@biswaruprana8102]

sir please make this type of videos more it's help lot...... Thank you so much sir😇😇😇😇😇😇😇

[@Jedex999]

Are sir please aise videos aur Lao js ki intuition build ho rhi hai meri aj phli bar sare questions aa gye

[@aadilshabir2854]

Problem number 3 solution: function emptyArray(arr) { return arr.filter((item) => !item); } console.log(emptyArray([1, 5, 8, 63]));

[@bhumikavaishay8580]

Sir, Please make more questions like this it really help me a lot to undertstand the concept in so many other ways...................Waiting for more questions like this!!!!!!!!!!!

[@yash_thefame]

That Background Music Make this Much Easier To understand....that is the we want to learn whole Video is Just awosome Great Explaination...

[@JoinMeInLearning]

Thank you for your teaching style-it makes everything much easier to understand. 😊

[@moviesprokhan1469]

well a wonderfull journey of 2 hours come to an end it was worth it to watch and follow u thanks once again

[@Mr.Zeus11]

Reverse Number:: Including negative value function reverseNumber(num) { let reversed = 0; let sign = Math.sign(num); num = Math.abs(num); while (num > 0) { reversed = reversed * 10 + num%10; num = Math.floor(num / 10); } return reversed * sign; } console.log(reverseNumber(-12300)); // -321 console.log(reverseNumber(123)); // 321 console.log(reverseNumber(450000)); // 54

[@ajiteshmishra0005]

Please upload some more videos like this by taking some kor difficult problems using Javascript

[@RazaAnsari-f5d]

First Question Hum aise bhi solve kr skte hai let a = "Raza Ansari" console.log(a.split('').reverse().join());

[@784saif]

This is very helpful !! Thankyou so much ❤

[@tashafkhan531]

19:40 the way he said 'Chauuuda'

[@manishachauhan710]

Sir please kuch questions ka solution bhut jada ghumane valla tha specially frequent element and shuffle valla pls sir in 2 programs ka koi simple solution bta dijiye.....baki sb smj a gya h ....and thankyou so much itna acha padane ke lieee

[@MuskanS6]

Really appreciate your efforts...thankss btw part 2 wasn't posted ?

[@Techinalfamilyinhindi]

8:15 Nimdaaa Dosrass Sthelmi Hardha-vhush KKRRAAK viku Nim-bhumla Mohina ZukOOO... Loha -KhuvAAA...

[@Bhota4951]

20 more questions needed btw amazing video❤‍🔥

[@MyTechTipsgrow]

easy and hard at same time . but sara smj agaya bohut achiy sa smjhty hn ap

[@blackwatch2150]

Just a friendly reminder, during interview they expect you to use self made code. You can't use pre defined methods. Like sort, reverse etc. So prepare accordingly. All the best guys😁😁

[@let_motivate]

give me more tips brother

[@pankaj8876]

That's totally true.

[@ProgrammingWithDataSci]

var str="hello sreehari how are you" var reverseStr=(str.split("").reverse("").join("")); console.log(reverseStr);

[@ravibhojani5286]

awesome questions and teching style.

[@NeerajYadav-zj5zh]

Please make some more videos, It was very help full !important

[@surajbhure8870]

Harsh Bhai, the way you teach is awesome, only I am distracted watching you when you adjust your glasses 👓 every15 secondsc.

[@adarshkumarnishad2304]

harsh bhaiya ki teaching style❤ koi banda ubb hi nhi skta pdhte time😄

[@atul-xt]

Question 4:- if you take number 0.1 it will give you Integer it will be failed in this situation any alternative approach ? If someone knows just drop ur logic ❤️

[@faizalkhan2437]

Because reverse method is for array it is not operate on string that's why we have to split string into a array then reverse it and join the array elements into string

[@onkarshinde7292]

Hi Harsh, Question - program to find frequent number is tough & hard to understand, so how can i solve it.

[@mohammadabbasali2802]

Bahi you are amazing ..Love from Hyderabad Please Keep helping us bahi in our web development journey❤

[@shikari2.044]

background me jo music bjta hai ekdum slow me kaafi relaxing lagta hai aapne saare videos me daalo bhaya..

[@saim4556]

ab ese kehte hai sikhana pura explain karke thank you bhaiya....

[@simplyskandi5973]

Thank you so much Harsh for putting together this important video! Really appreciate the hours of work you and your team put into recording/editing these videos all for free. Would like to support you by buying paid courses.

[@Mr.Zeus11]

/* 11:: Write a JavaScript function to get the first element of an array. Passing a barameter 'n' will return the first 'n' elements of the array. */ const retrieveNthFirstEle = (arr = [], n = 1) => { if (arr.length === 0 || n { if (arr.length === 0 || n = arr.length) return arr return arr.slice(-n); } console.log(retrieveNthLastEle([1,2,3,4,5,6,7], 2))

[@afzalguru643]

that's great teacher and well teaching method keep it up brother

[@KULDEEPSINGH-eu8me]

bhaiya can we do this also var array = [1, 2, 3, 4, 5, 6,7 ,8 ,9, 0]; var emptyArray = array.splice(array.length, array.length) console.log(emptyArray)

[@Mr.Zeus11]

Question 1: advanced solution with Palindrome problem. const removeSpaceFromString = str => str.replace(/\s/g, '') const reverse = str => str.split('').reverse().join(''); const ispalindrom = str => { const isString = (typeof str === 'number') ? str.toString() : str; const valueWithoutSpace = removeSpaceFromString(isString) return (valueWithoutSpace === (reverse(valueWithoutSpace))) ? 'Palindrome' : 'Not Palindrome' } console.log(ispalindrom('m a m')) //Palindrome console.log(ispalindrom(5.5)) // Palindrome console.log(ispalindrom('deified')) // Palindrome

[@ahmar__0085]

thank you so much sir. It helped a lot.

[@thefourhourtalk]

most amazing question series omg this is just wow ; the explanation of bhaiya was truly amazing loved it bhaiya genuinely loved it

[@mansisaw5974]

Sir please make full course on html ,css, javascript, full stack developer course Please sir I like the way u teach !!! Please sir highly requested...🙇

[@rushikeshdhanawade4425]

Thankyou For This Lessons Sir

[@AhmedBhatti-b5k]

Thank you So much for providing such a good type of stuff. You and your team have proved to be the best teachers on the KZbin I ever seen on. One Of my little request, please make a video on the Flutter Development For beginners. ❤😊...

[@surbhijoshi8162]

Very helpful..thankyou sir🙂

[@ankitavishwakarma4754]

Sir aap explain bahut achese kar rahe hain but jo background sound hai wo thoda sa disturb kar rhi hai concentrate hoke sunne me... Aapne bahut achi tarah se samjhaye hai problems mujhe saare samjh aaye per sound ne thoda sa problem diya other wise 10/9 .1 marks for sound

[@atulsharma2734]

What about string Ex.- var a ="12" Then also its giving integer

[@jigarkumar9073]

Your teaching skill is amazing.... explore many things that are easy but never thing on that way...bus aap problem solve karte joke karte ho... usme aisa lagta he k jaise koi lorry driver drive karte karte joke mar raha he... 😂😂😂

[@rashmidhande6234]

Thank you so much... amazing and excellent content...

[@sadiakhan5371]

500 Likes and 150 comments ka target that for the next Questions video ab to Biya 6.3K likes and 318 Comments ho chukay hain so please continue this series ek alag playlist bnayn for Questions and bring more basic to advance JavaScript Questions on all JS topics, Thankyou.

[@11deepikarao48]

You are teaching very good keep going and make interview questions for experienced also and try to make on every important topic in js and react

[@Jedex999]

Love you sir job lg gyi to phle salary se apka hi course kharidunga

[@prakashdhamdhere8581]

bhai muze laga Q.5. ka ans mai solve kr sakta hu to maine solve kiya but aapka ans dekhkr meri shakal 😳 . my Ans. - function duplicate(val){ var sampl = []; for(let i=0; i

[@priyakarn5191]

sir kya is question ko aise bhi kr sakte hain???? // 16. write a javascript function to get the last element of an array. Passing a // parameter 'n' will return the last 'n' element of the array // and should not come undefined value // function arr(e,n=2) // { // const res = e.reverse() // if(n

[@sonukam7284]

make a path, write in 30 points the interview questions from easy to difficult of the javascripts programming language

[@Mr.Zeus11]

More optimal solution for gender based filter: General filter: const filterByGender = (users, gendersToFilter) => { return users.filter(user => gendersToFilter.includes(user.gender)) } console.log(filterByGender(users, ['male'])) Solution for Exclude: const filterByGenderExcept = (users, gendersToExclude) => { return users.filter(user => !gendersToExclude.includes(user.gender)) } const users = [ { name: 'abc', gender: 'male'}, { name: 'cc', gender: 'female'}, { name: 'bb', gender: 'any'}, { name: 'dd', gender: 'female'} ] console.log(filterByGenderExcept(users, ['male']))

[@jaiswalgaurav957]

Pure Gold 👌👌

[@AsmaKhan-qf6gd]

it was super informative video please bring part 2

[@TechSubhajit]

Thanks bhai for such awsome content ❣️ from Kolkata

[@mdmonis_]

54:40 waah waah "bole jo koyal" 😂😂😂😂😂😂😂😂😂😂

[@kashmirtechtv2948]

have watched complete video

[@ajayaadsule]

can you make more video like this for javascript question it's amazing video

[@ShwetaSingh-rb8hu]

Tysm bhaiya this is very helpful 😊

[@anirudhachakrabarty2050]

Awesome harsh bhaiya ... Make more and more videos like this..

[@Minhajul-h1d]

// Write a javascript program to compute the union of two arrays let newArr = [1,2,3,4,5,6,7,8,9,10]; let newArr2 = [9,10,11,12,13,14,15,16,17,18]; function union(arr1, arr2){ console.log([...new Set(arr1.concat(arr2))]); // return [...new Set(arr1.concat(arr2))]; } console.log(union(newArr, newArr2)); //Question : Why is there showing undefined showing in the output?

[@Minhajul-h1d]

One output is perfectly showing but another is undefined, What is the error?

[@geek_24]

Why commented the return statement? uncomment it, will work.

[@aavezshaikh143]

Bhaiya JS me chrome k devloper tools me debug functionality kis tarah se use ki jati hai ek video banao. cover what are breakpoints.

[@elhamwaheed9529]

// function reverseFunction(num) { // let mod; // let result = ""; // while (num > 0) { // mod = num % 10; // mode 10 return last digit of number // result = result + "" + mod; // num = Math.floor(num / 10); // return the start digit // } // return Number(result); // } // console.log(reverseFunction(123456789));

[@Tamatar8263]

1:16:10 can't we just use return arr;