Map, Filter, Reduce in JavaScript | The Complete JavaScript Course | Ep.43

📖 Chapters
00:00 - Quick Recap
00:55 - Map Method in JavaScript
07:26 - How to use "index" inside forEach and map method?
12:58 - Filter Method in JavaScript
18:39 - Quick Assignment 1
19:51 - Quick Assignment 2
22:33 - How "Filter" Method Works? Chaining Array Methods!
37:49 - Reduce Method in JavaScript
01:01: 29 - Conclusion


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Music by geoffharvey from Pixabay

[sumanshrana]

bhaiya cotnet next level ha bahut maza ata ha
SUGGESTION- BHAIYA BPLEASE THODA SA AUDIO QUALITY ACHA KAR DIJIYA

[mdfurquanalam]

19:51 ye rha assignment ka solution:

const filterMonths = months.filter(elem => {
for(let i=0; i<elem.length; i++){
if(elem[i] === 'm') {
return elem;
}
}
});
console.log(filterMonths);

OUTPUT:
[
"march",
"may",
"december"
]

21:40
const filterMonths = months.filter(elem => {
return elem.includes('m') || elem.includes('M');
});
console.log(filterMonths);

OUTPUT:
[
"March",
"May",
"December"
]

[adityasinghh]

Bhaiya Ji pehle baar mein hi crystal clear ho gaya. Hawa hawa mein nhi. Pen and paper leke practice kiya along with using ) bhi poore acche tareeke se clear ho gaya bhaiya. Bss ab kal subah wapas se poore video ko revise karunga badiyaan se!!!

[AishwaryaShinde]

Best playlist 👍hope your channel cross millions of subscribers.

[MuhammadShamail-pexe]

Well explained bro 🥰🥰 you deserve more subscribers 😍😍😍.


From pakistan🤩🤩🤩

[AliWaseemKhoso-zskf]

The telegram group link is not opening.

[adityasinghh]

18:49
const filteredMonths = months.filter((month, index) => {
console.log(index+1, month);
return month.length >= 5;
});
console.log(filteredMonths);

[stocfxd]

sir awsome teaching sab samajaaya ek hi bar main thanks sir

[dharmeshgohil]

it is very sad you dont have uploaded video of polyfill s of map reduve and filter mehod, what we expect it coming or not

[codinglife]

19 :00 //qn----aise name find kro jisme a include hai

const day= ["sunday", "monday", "tuesday", "wednesday"];
const chekdaylatter= day.filter((data)=>{
return data.includes("u");
})
console.log(chekdaylatter);

[swagatpandak]

0:00 sirka haatka mehendi utar gaya hai.( I dont know what that is but my best assumption is that's a mehendi.)

[Muhammadshakir-tpcv]

Sir kasay pata chalaa gaa ka yehper foreach kaa use karnii haai our yehper map kaa.. please guide me❤

[mohmmadjesus]

very well explained bro, Eagerly waiting for your React Js series.

[aashikroy]

reduce ( id did it like this ):

const arr = ["cat", "dog", "rat", "mouse"];

const myNewArr = arr.reduce(
(accumulator, currentValue, currentIndex, array) => {
return accumulator + currentValue;
}
);

console.log(myNewArr); // output : - "catdogratmouse"

[Mohammed]

Hi sir. In forEach video u said by using map if u retun anything it will return as array but in this video u see even if u use return keyword in capitalMonths variabke y in console return values r not printinng. Pls clarify this

[Asadalicoder]

19:20
const months = ["January", "February", "march", "april", "may"];
const fMonths = months.filter((month)=>{
console.log(month);
return month.length >= 5

});
console.log(fMonths);

[adityasinghh]

37:10
return student.startsWith('A');
bhaiya includes ke jagah yeh bhi chalega na yahan prr ???

[aashikroy]

Assignment :

const students = [
{
name: "Anthony",
age: 23,
},
{
name: "Amar",
age: 23,
},
{
name: "Akbar",
age: 18,
},
];
const myNewArr = students.filter((element, index) => {
return element.age > 18;
});

console.log(myNewArr)

[aashikroy]

assignment :

const arr = ["cat", "dog", "rat", "mouse"];

const myNewArr = arr.filter((element, index) => {
if (!element.includes("t")) {
return true;
}
});

console.log(myNewArr);


Second Approach :

const arr = ["cat", "dog", "rat", "mouse"];

const myNewArr = arr.filter((element, index) => {
return !element.includes("t");
});

console.log(myNewArr);

[xpyqghg]

sir mujhe smjh m toh aata he par bhul jata hu and sir andsir jo 19:51 pe assigment que. tha use me nhi kar paya 😣sir me nhi sikhg paunga kya