Search from array of objects in javascript

[@mananpatel9802]

it may sound a bit complex but u taught so well that i wasn't confuse at any point in the video, your explanations are so clear, probably you are one of the best programming teacher on KZbin :)

[@gravelessForever]

To anyone that is confused about findIndex: findIndex is a method that will iterate through each item in the array. The "callback" function he adds into it, is a "test" findIndex will iterate through each item in the array, and run it through this "test" First it passes the item into the "test" as an argument, in the case of 9:10, the arg is "todo" Your "test" should be set up so that it will return true or false based on this item of the array that is being tested. If it returns true (or false I forget), the method findIndex will return the index of the array that passed your "test".

[@nusrathfatima7095]

Please make short videos..its difficult to understand this concept but I'm learning so many things from you. I appreciate your effort. Thank You @Hitesh Choudhary❤️❤️

[@pottingshedgene]

Finally, someone who explains that parameter/argument/variable names could be just made up. Thank you Hitesh.

[@keshavsharma3101]

Yes Sir you are right it is hard to teach , talk and write a code but i want to say sir you have done a fabulous job.I want to thank you from my bottom of my heart. I always find it hard to study javascript but your well structured course help me to get it. THANK-YOU SIR

[@sanudajayathilaka3173]

go through all the documentaion for the findIndex() all of your confusions will be solved trust me!!! video is amazing thank u soo much

[@mystique1127]

Ok. I am going for it. If i am confused afterwards, u r ded 😪

[@mocococo2877]

Thank you for your time and efforts to make this video. One thing I was waiting for you to say explicitly was if those return just one value or more than one, if we have duplicate values in an array.

[@dennypaul]

Hello bro, Thank you for the lesson. I have a confusion in the method 1 : const index = myToDos.findIndex(function(todo, index)). My question is, how does the todo and index get values? because we are not calling in the function with any parameters. I understand it is a self invoking function but couldnt understand how the parameters got their value. any help would be appreciated. thanks in advance.

[@vivekbhardwaj8295]

understand it as forEach

[@sucesssoulman]

A callback function in a findIndex() works like that. You can use even 4 parameters and each one has its own objective. the first parameter: element The current element being processed in the array. the second parameter: index which is Optional The index of the current element being processed in the array. array Optional the third parameter: The array findIndex() was called upon. this parameter is Optional

[@dilipgautam]

Enjoying the series,sir. If possible make video about machine learning with javascript and how to get started.

[@kaituo1803]

I like your videos a lot, but not this one. I found this one is not as clearly-taught as your previous videos.

[@kumarkanav]

Totally...confused

[@dragonboosterartha]

Awesome! Thank you for your tuition. It's very useful for me.🤝

[@shubhiVerma_]

video is Awsom and guys how have confusion in that , they read documentation things gets more clear !!!!

[@mukeshphulwani5972]

This things can be done much more easily you are going little complex here

[@niharranjanbhuyan9839]

Yeah

[@songlee8456]

How can it be more simple? He just not confortable in what he's teaching, other than that this is the best approach to find an element inside an array of objects. Index of is not a good option

[@tanujkalra7334]

@@songlee8456 function search(arrayofobjects,index) { for (var i = arrayofobjects.length - 1; i >= 0; i--) { if(arrayofobjects[i].name.toLowerCase()===index.toLowerCase()) return i; } return -1; }

[@poojaanandan3869]

Hey. Can you explain me the necessity or significance of using === in return statement of findIndex method. Here, we are comparing the object title with a string right? so how is it same as comparing or checking if they belong to the same memory space? p.s. i have seen your ==v/s=== video but i don't understand how === is returning true value when an object title is compared with a string.

[@mfklogsaif]

Amazing style of teaching you have, really impressed!

[@sachintiwari5871]

Great explanation in very easy way sir......

[@adarshtodi1158]

*EXPLANATION Xd* what we are doing here is : Searching a property of an object inside an array using find index inside a function which calls a lowecase comparison between the object title and the tile of the parameter which is passed through callback function of findIndex inside a function variable.. So basically in simple words. We pass two arguments inside a function called todo, which has a variable and that variable stores index of the tile which we need to find. And that is found via findindex method and that method requires you to enter an callback function. And inside that function.. A simple comparison is done so that when you have any case sensitivity error while searching then the output will be the same..

[@yashshende2786]

Sir I watch video 5 to 6 time still I am little bit confused what should I do

[@kushalthapa2865]

Too late. Change teacher

[@vishalagarwal7707]

Well, the whole confusion here is because of the concept that was taught in earlier videos and what is being used here. Concepts taught: Arrays & Objects Array definition: let someArray = [element1, element2, element3,element4] (Note elements can be of any type, for ex: element1 can be integer, element2 can be string, element3 can be function and element4 can be object) & The concept used: Array of Objects i.e. let someComplexArray = [{element1}, {element2}, {element3}, {element4}] so now, from the video we can understand newTodos is basically is of the above type. one reason for using "arrays of objects" can be for using predefined array functions { just like findIndex() } and array elements can be called by their index, which is not the case with objects and the elements can be accessed without using "this" keyword. const newTodos = [ {title: 'Buy Bread', isDone: false,}, {title: 'Go to Gym', isDone: false,}, {title: 'Record youtube videos', isDone: true,} ] Can you also notice why after isDone: false a comma is not required. ? well, because is the last element of the object and after that, a new object element is created. This concept is Array literal with multi objects as values.

[@chris94kennedy]

That is not why the confusion exists. It exists because it's a poor choice of iterator for the use-case, and it's badly explained anyway. Please see my recent comment for a detailed explanation and optimal solution.

[@yugankumar6416]

Tip 1 : "Keep Moving" 😂♥️

[@3101leonardo]

Dude you are the best.

[@girishadapa90]

Really no words hithesh bro ... Definitely some people's learn & earn your videos via ... Nyc nyc

[@mohitnayak5049]

This video is confusing. I'm confused a bit. Previous videos are much more clear. Help.

[@sara1010]

You are doing everything beside what you said you should do.

[@GorillaDev417]

Love your teaching style! Thanks!

[@rahulagnihotri344]

Incredibly confusing video, after watching 3 times also I understood nothing, really very complex.

[@manishshrestha241]

same heree

[@rippybrar1819]

findIndex(todo) works fine like this too. What is the purpose of passing index in the parameters

[@tim.bogdanov]

why are you setting all your functions inside a variable?

[@travezripley]

Thank you @Hitesh! This was the solution I was looking for!

[@user-wb5ox7nw2u]

really simple as ever

[@crystalchaung1576]

I am learning about accessing objects inside arrays for the reduce method. I got stuck at [9:24]. What is happening with the strict comparison operator? From what I see, the line seems fine until that point.

[@lohithkumar8257]

jai hoo....hitesh bhai

[@Submersed24]

Do you happen to know how this works in usestate function of react?

[@tvshows1344]

hi sir, I am seeing your SQL injecton course. there i have a doubt! after some website as you type "?id=1" and after this you typed a forward slash which showed you an error. but to me the page just loads again. even if type a comma near it. whatt does that mean??

[@bapi6060]

If I use the forEach() function, but I have to print only some of the elements in the array (say from index 1 to 5 or index 0 to 8) is it possible to do so?

[@debendrasahu6650]

Waiting for your next video sir It's quite amazing and interesting

[@crazyfm6312]

sir i cannot get it

[@sabuein]

Thank you, brother.

[@akashtakawale9074]

Second paramter of both find and findIndex functions i.e index is not neccesary and we have not even used it.

[@jl-dq5ch]

damn, that bottle is awesome =O

[@bhumimehta7906]

hi Hitesh, I want to know about Delphi language and future scope of it, can you give me some information about it?

[@Ricqua]

What?! You sound like a good teacher but you totally lost me on this one.

[@mystique1127]

Lmao 😂

[@hardik.motwani]

const index = newTodos.findIndex(function (todo, index) { console.log(todo); return todo.title === 'Go to Gym'; }) return todo.title === 'Go to Gym' I understood that it compares title and if title matches it returns true, but here index is returned how? It should return true, findIndex finds the index and if the condition matches, it will return, am i correct?

[@creativeisland1996]

u r the best

[@udayyadav3489]

you know what, i was travelling in the metro with the exact same bottle and they caught me up thinking it contains alcohol [it looks like that under the scanner] . so just beware of that little cute bottle beast

[@Haneef30100]

SO findIndex() must be provided a function called predicate. First google that then you will understand.

[@karunakaran7]

this helped me. thanks a lot

[@code_react]

OK what if you have array of objects but you don't know the key and its value. How can you filter through that?

[@ashutoshcbr1988]

08:10 "callback functions are simple functions with no name" Thats not true.

[@ppg3530]

Did he mean anonymous function instead of callback functions there.

[@80Vikram]

9:42, is it "every single array" or "every single array element" ?

[@user-wb5ox7nw2u]

every single element in array

[@harsh8580]

bhai ji ,u r taking same examples(todo type)which is confusing mee alot ,if posible can u change the example names

[@aravindkumar8145]

[1,2,2,3,5,5,5,7,9,9) => sort this array by no.of repetition

[@seekingcode]

Very helpful. Thank you!

[@mahmoodkashmiri]

Waiting for next video ...

[@calvinebun-amu5397]

Lovely. Thank you .

[@umairali2360]

try this, i am confusing on this result"on two titles i write down go to cinema but it shows only 1 find index" var anotherSearch = [{ title:'go to school', isDone:false },{ title:'go to school', isDone:false },{ title:'go to cinema', isDone:false },{ title:'go to cinema', isDone:true }] console.log(anotherSearch.findIndex(function(value, index){ return value.title==='go to cinema' }))

[@adiishukla196]

Sir I can use casesensitve

[@user-wb5ox7nw2u]

hey, Hitesh I tried array with objects with a different approach to create an alarm with notifications, I got the wrong answer= -1 but I have done everything right let Almrem=[ { day:"monday", wake: "up 6:0clock", task:"do javascript " }, { day:"Tuesday", wakeme:"up 7:00 clock", task:"Read Js documentation " }, { day:"wednesday", wakeme:"up 5:00 clock ", task: "watch Naruro shippuden " } , ] let mummy=Almrem.findIndex(function(eleme,index) { return Almrem.day ==="monday" } ) I'm getting output -1

[@rthosarrohini]

Make video on how to store user input(dom inputs) into array of objects dynamically?

[@aryanshmahato]

Bhaiya do the giveaway of that bottle!

[@80Vikram]

15:40 why you're not using ";" at the end of statements ?

[@AbualHassanPervaizAkther]

I was confident now confused :/

[@ronit5104]

Sir, say somethings in hindi By the way videos quality is excellent

[@sanyammadaan2396]

Sir Please make a video on Service Worker using javascript for beginners

[@vijayakumarrethinam6603]

good one

[@thejasiliemetha]

Thank you.

[@aeonian_joy]

This video is not as clear as your previous videos. It is confusing. Doubts are there..

[@kumarkanav]

I agree

[@mohitnayak5049]

agree

[@edsonnovaes343]

Obrigado

[@IHACKYOU4U]

Please make video On Spring.

[@takhminam6068]

Thank you so much!

[@owdji187]

this bottle is sick

[@nitinroy1331]

My favourite teacher bought a PINK bottle and flexed it :'(

[@Raj-uz9nv]

Little bit difficult this video to understand this concept

[@beastgaming8501]

i watched 3 times still confusing

[@chris94kennedy]

Please view my recent comment for a cleaner explanation, using better methods. This is such a misleading video.

[@adiishukla196]

For return prblm u can use find

[@Denzil3386]

Rather thank typing the entire code in 1 line, you should actually try and break down the way you write your code as well. Writing your entire code in 1 line makes it a bit tough for people. Anyway, thanks! ;)

[@muhammadkalim]

complex way

[@angestu]

const findTodo = function(myTodos, title){ const index = myTodos.findIndex(function(todo,index){ return todo.title.toLowerCase() === title.toLowerCase() }) return myTodos[index] } let printMe = findTodo(newTodos, 'Goto Gym') console.log(printMe); i have got an undefined message ...

[@mi5956]

why the hell do you mix the (to lower case) problem with finding object in the array. this makes lot of confusion for new learners. just put it aside.

[@vivekbhardwaj8295]

instead of titleRetrned it should be title object returned

[@yashrajanshukla7790]

I also have that type of bottles

[@sivasumanth]

Bro how to sort array of json

[@vineetbramhankar8099]

i liked the pun at the start ..

[@tusharkadam7471]

I was watching this video in 2x speed

[@adarshtodi1158]

RIP

[@aravindkumar8145]

This is the interview questions i failed

[@nidhiawasthi4643]

Plz don't use Todos.... It really confuses sometime

[@monaarsh1462]

Cute.....

[@adilzamal3218]

I am skipping this video.

[@80Vikram]

18:56 "=" should be "==="

[@juliouskaiser1869]

21:06

[@piyushmahapatra5402]

Bhai beginners hai ham log,itna complex kyun banaya? :( time waste hogaya,abhi kuch dusra dhunddna padega youtube mai.

[@_rtdp_]

😊

[@bhargava8038]

☺☺☺☺☺☺☺

[@mahendrayadav5060]

a little bit confusing :(

[@anshulkanwar1]

Todo tudu todu tudu tudu tudu tu doooooooooo

[@adarshtodi1158]

tuturuuuuu (search this word on youtube for more fun..)

[@niravrk5446]

Its is the bit hard

[@dhruvrawat6619]

to complx

[@rachitchoudhary6063]

170

[@erfanasgari21]

f** specially because of the bottle

[@SilverTheFlame]

No offense, but you do not explain what you're doing well here. This is one of those coding videos that is NOT helpful. At one point you even said that something was obvious when you hadn't explained it! You can't just assume all viewers know what you're talking about!!