Using map() to return all names in capital 🔥 #javascript #javascriptinterview

Javascript Interview Question on map will be discussed in this video. This is very important for frontend interviews.

[anantsharma]

It is not always the one liner or two liner code but how readable your code is.
Here it is fine because it was straight forward.

[SatyakiBhargava]

Its called lambda functions or annonymous function. And code is never messy because of more number of lines. That lambda you wrote is hard to bring in unit test coverage.

[ankushmalik]

Very good coding questions. Please keep posting more such shorts.

[ikoiko]

also arr.reduce((acc, curr)=>{
return [...acc, curr.name.toUpperCase()]
}, []) will be very efficient

[kaushikitagib]

actually Space complexity of map is o(n) and for loop people claim it's o(1). but since, we use array for result the auxiliary space still be o(n). 😅😅😅😅

[darshanhegde]

Bro map also does same for loop in its inner method and returns new array, 😅 basically it's one and the same

[SpideyGuy]

It wasn't a messy code it was straight forward 😂

[smachohalla]

ok now check the performance between these 3 looping mechanisms and choose which is better

[VikashKumar-trcq]

Isn't this approach taking extra space, (for map approach)

[דניאלאביב-ות]

const capitalStudentsNames = students.map(({name}) => name.toUpperCase());

[MightyIndians]

You could have destructed the name to reduce the code further

[appwala]

But for performance. For each is better.

[personalatick]

it will be very easy.. if you have minimum common science👀😐

[ardhiyanah]

You cant use foreach, since foreach cant return any values but it still able to convert to capitalize

[tafaxtra]

Loop performance is far better for large data sets

[astitva]

you could've also used the Some function

[abisekhdey]

//9a. Convert The names into Upper Case using for of loop
let student1=[
{Student: "Abisekh", roll:1},
{Student: "Pallabi", roll:2},
{Student: "Subham", roll:3},
{Student: "Raktim", roll:4},
];
for(let i of student1){

}
console.log(student1);
//9b. Convert The names into Upper Case using for in loop
let student2=[
{Student: "Abisekh", roll:1},
{Student: "Pallabi", roll:2},
{Student: "Subham", roll:3},
{Student: "Raktim", roll:4},
];
for(let i in student2){

}
console.log(student2);
//9c. Convert The names into Upper Case using forEach loop
let student3=[
{Student: "Abisekh", roll:1},
{Student: "Pallabi", roll:2},
{Student: "Subham", roll:3},
{Student: "Raktim", roll:4},
];

console.log(student3);

[omrout]

Bhai i am commerce background student .Last 2.5 year i learned and make project on MERN stack but some time in my mind create negatives thought's can i make good decision . Make me sure it

[Lucifer-xtun]

Please make a full length video with questions like these on objects bro there is no video on youtube i searched a lot. So it help a lot mutually please reply if you read and consider my request

[iamworstgamer]

there can be multiple approach to a stupid question? no, its just getting keys from each object and upper case, every approach is same. choose one which is more idiomatic