Arrays - Data Structures and Algorithms in Javascript | Frontend DSA Interview Questions

In this video, we will dive into Array methods in JavaScript and explore their various use cases. We will also discuss commonly DSA interview questions related to Arrays and how to solve them using JavaScript.
This is the most Entertaining and Knowledge Packed Data Structures and Algorithms in Javascript Interview Course on Youtube !

#javascriptinterviewquestions #datastructures #datastructuresandalgorithms

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➡️ Source Code -

📄 Homework Questions ( I will make videos on these questions as well ) -

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00:00:00 Intro
00:00:54 Creating an Array
00:01:34 Initializing an Array
00:02:24 What all can array store?
00:03:24 Array length Property
00:03:54 Add / Remove items in Array
00:03:58 Push and Pop method
00:05:32 shift and unshift method
00:06:29 Looping the Arrays
00:06:49 "for" loop
00:07:37 "while" loop
00:08:09 Inbuilt Traversal Methods
00:08:25 map() in Arrays
00:10:14 filter() in Arrays
00:10:59 reduce() in Arrays
00:12:55 some() in Arrays
00:13:25 every() in Arrays
00:14:01 find() in Arrays
00:14:42 Spread and Rest Operators
00:17:51 More Array Methods
00:17:56 concat() in Arrays
00:19:19 slice() in Arrays
00:21:13 splice() in Arrays
00:22:47 fill() in Arrays
00:23:58 findIndex() in Arrays
00:25:09 flat() in Arrays
00:26:19 Technical Glitch
00:26:48 reverse() in Arrays
00:27:18 sort() in Arrays
00:29:44 DSA Interview Questions on Array in Javascript
00:29:50 Ques 1 - Second Largest Number
00:30:28 Solution #1 - Brute Force Approach
00:34:46 Time Complexity of this Algorithm
00:36:33 Solution #2 - Optimised Approach
00:39:30 Explanation of Solution #2
00:41:29 Time Complexity of this Algorithm
00:42:26 Space Complexity of this Algorithm
00:42:49 Ques 2 - Rotate Array by K
00:43:51 Solution #1 - Using Inbuilt JS Functions
00:48:40 Time Complexity of this Algorithm
00:49:24 Solution #2 - Without Inbuilt Functions
00:56:26 Time Complexity of this Algorithm
00:57:29 Space Complexity of this Algorithm
00:58:16 Ques 3 - Remove Duplicates from Sorted Array
00:59:20 Solution #1 - With Inbuilt JS Methods
01:03:08 Time Complexity of this Algorithm
01:03:32 Space Complexity of this Algorithm
01:03:41 Solution #2 - Two Pointer Approach
01:07:28 Explanation of above algorithm
01:10:22 Time / Space Complexity of this Algorithm

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[RoadsideCoder]

If this video gets good response, I will make more DSA videos, so do share it with others 🔥

[shivamkumar-zzkp]

please please please dont quit this course....please keep uploading

[damandeepsingh]

// Ques 2 - Rotate Array by K

// Given an integer array nums, rotate the array to the right by k steps,

// where k is non - negative.

// Input: nums = [1, 2, 3, 4, 5, 6, 71, k = 3
// Input: nums = (-1, -100, 3, 99], k = 2Output: [5, 6, 7, 1, 2, 3, 4]Output: [3, 99, -1, -100]

solution :
function rotateIT(nums, a) {
for (let i = 0; i < a; i++) {
nums.unshift(nums.pop());
}
return nums;
}
let num1 = [1, 2, 3, 4, 5, 6, 7]
let num2 = [-1, -22, 33, 4 - 2]

console.log(rotateIT(num1, 3));

[chinmaay]

size > k || size < k should also be there in case, size < k 49:50

[Android-]

Excellent session!
Looking forward to the whole series.

Also,
#FreeAlgoAgarwal 🚩

[purusharma]

Wow, ab to video aur acchi hoti ja rahi hai day by day

[ThelookAt]

Khatrnak bhaii.. All array clear in one video my frnd also thx me for your video🎉❤

[lucaliebenberg]

Great content, would be awesome if you could upload more and continue with DSA's (going into string manipulation and potentially some common toy problems in JS!) 🙏👑

#FreeAlgoAgarwal

[dipalikumari]

best video..please continue this great work

[tpadma]

I have purchased DSA JS e-Book, really helpful...direct links to leetcode....thank you for preparing

[wizzy]

Moving forward from that joke was a better decision than anything else

[VarunKapoor-tcje]

thanks bro . we really needed quality dsa guidance in Javascript

[shubhamsharaff]

Hats off to you man ❤, the way you're explaining is so simple to understand any methods in this array video

[avinashgardasalgonquin]

Bro, thanks a lot for making this video. I've been waiting to watch a tutorial that covers most of the functions with arrays.

[gauravdhenge]

Thank you so much brother your all videos are very needful...!!!

[hushjem]

✨Nice Explaintion of the and logic its very helpful plz do such videos thank you fpr knowledge✨

[ajitpatil]

Thumbnail is very good 🔥 and also the concepts are well explained in organised manner. Problems on those concepts make more understanding.

[ravanabuddha]

How did you calculate the time complexity of splice method to be O(1) at 1:03:15? In my opinion it should be O(n) since it has to modify the whole array.

[ashishmadan]

Very knowledgable content, almost all my approaches are similar to yours !! ❤😎

[kedarkulkarni]

Please make strings problems they really help in interview as well as general coding