ES6 Tutorial #8: map, reduce and filter| Interview Question| Modern Javascript 2021

map, filter and reduce are the most important Higher Order functions in javascript that works with Array to modified or transform your data.
I have explained these methods with basic to advance examples. Please watch the video till the end to get the best out of it. There is one problem solving assignment at the end for you :)
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00:00 - Introduction
00:50 - Array.map()
09:25 - Array.filter()
13:38 - Array.reduce()
19:08 - Complex example(combing map, reduce and filter)
24:20 - Method chaining
25:55: Assignment
26:20: Thanks for watching 🙏
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[@asif1318]

Hey, here is the Assignment:
const totalScoreRating = emply.reduce((acc, value)=> {
if(value.title === 'Senior Developer'){
acc += value.rating1 + value.rating2;
}
return acc;
},0);
console.log(totalScoreRating);

[@vasanthapandiyanm2405]

Put videos about closure, function currying, call, apply, bind...

[@NishaSingla]

Watch complete Playlist on javascript here: czcams.com/play/PLC8OkhrVTHNFzxNVvdtCmTw5OSYs4wv5H.html
Do let me know how you found this video? I read all the comments, would love to hear your feedback! ❤️

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You are one of the best teachers!! Thank you for these amazing videos 👍

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Watching you content i cracked top 5 mnc interview in angular and javascript. Thanks

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This comment means a lot 🙏🙏
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[@monikasingla1339]

👍

[@tuktuk00794]

wahhhh mam kya explain kiya hai apne.......very good explanation , especially reduce()😊😍🥰

[@unemployedcse3514]

Awesome ❤️

[@user-iz8du7vr4p]

Best

[@avinashkumar8306]

Helpful!

[@samarscript5824]

26:17 Assignment .
const total = employees.reduce((accumlator, value) => {
value.profile ==="Senior Developer"?accumlator += value.rating1 + value.rating2: accumlator;
return accumlator;
}, 0);

[@RahulYadav-nw3on]

Hello nisha thanks for all the videos they are clear and simple no beating around the bush straight to the point videos !! I request you to please make video on reactive forms and template driven forms .. TIA !

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Thank you so much 😊.. sure will update soon 👍🏻

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Can you make vedio on jwt authentication and authorization in angular

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which method of evaluation is faster between logical operator and ternary operator

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[@ajaykumar-ho4wz]

const result = employees.reduce((acc, emp) => {
if(emp.profile === 'Senior doveloper') {
let output = emp.rating1 + emp.rating2;
acc = acc + output;
}
return acc;
}, 0);
console.log(result);

[@aayush5474]

Mam can you upload videos on spring boot as well?

[@NishaSingla]

For that I need to learn spring boot first 😬😬

[@hajarathbabu4200]

What is higher order functions?

[@NishaSingla]

Will upload video on that .. stay connected 😃

[@amitq7000]

High order function is a function which accept function as an argument and/or return function

[@NishaSingla]

Thanks Amit
You can watch the video on higher order function here
czcams.com/video/BwyFLRVYbvU/video.html

[@harika218]

Hi, Here is my assignment
let totalValue = employees.reduce((acc, emp) => {
if(emp.role == "Senior Developer"){
acc += (emp.rating1 + emp.rating2)/2
}
return acc;
}, 0)
console.log(`Reduce Operator => ${totalValue}`);

[@chanduBoddu]

const TotalRating= employes.reduce((acc, val) => {
return (val.role === 'SE' && val.rating1 + val.rating2) + acc;
},0);
console.log("Total Rating !",TotalRating);

[@FactuallyConnected]

The solution of the assignment:
Sum up the ratings of all the Senior Developer only using reduce method:
const employee = [
{id:101, name: "ashish", profile: "Senior Developer", rating1:5, rating2:10},
{id:102, name: "ashok", profile: "Junior Developer", rating1:6, rating2:10},
{id:103, name: "aman", profile: "Senior Developer",rating1:7,rating2:7},
{id:104,name:"ashu",profile:"Senior Developer",rating1:8,rating2:7},
{id:105,name:"anjan",profile:"Junior Developer",rating1:9,rating2:10},
];
const seniorCount = employee.reduce((acc, curr)=>{
if(curr.profile === "Senior Developer"){
acc += curr.rating1 + curr.rating2;
}
return acc;
},0);
console.log(seniorCount);
Using map, reduce and filter method :
const seniorCount = employee.filter((item)=> item.profile == "Senior Developer").map((x)=>x.rating1 + x.rating2).reduce((x,y)=>x+y,0);
console.log(seniorCount);