JavaScript reduce() method in 5 minutes! ♻️

Рет қаралды 34,016

Күн бұрын

// .reduce() = reduce the elements of an array
// to a single value
// ---------- EXAMPLE 1 ----------
const prices = [5, 30, 10, 25, 15, 20];
const total = prices.reduce(sum);
console.log(`$${total.toFixed(2)}`);
function sum(accumulator, element){
return accumulator + element;
}
// ---------- EXAMPLE 2 ----------
const scores = [75, 50, 90, 80, 65, 95];
const maximum = scores.reduce(getMax);
const minimum = scores.reduce(getMin);
console.log(maximum);
console.log(minimum);
function getMax(accumulator, element){
return Math.max(accumulator, element);
}
function getMin(accumulator, element){
return Math.min(accumulator, element);
}

Пікірлер: 40

@BroCodez 11 ай бұрын

// .reduce() = reduce the elements of an array // to a single value // ----------- EXAMPLE 1 ----------- const prices = [5, 30, 10, 25, 15, 20]; const total = prices.reduce(sum); console.log(`$${total.toFixed(2)}`); function sum(accumulator, element){ return accumulator + element; } // ----------- EXAMPLE 2 ----------- const scores = [75, 50, 90, 80, 65, 95]; const maximum = scores.reduce(getMax); const minimum = scores.reduce(getMin); console.log(maximum); console.log(minimum); function getMax(accumulator, element){ return Math.max(accumulator, element); } function getMin(accumulator, element){ return Math.min(accumulator, element); }

@Blitz61wasd 11 ай бұрын

Django course please

@Praeda19 6 ай бұрын

Dude, thank you SO much, the way you've explained how the three data transformation array methods work, as well as the how the forEach loop works, is incredibly easy to understand. I've finally got my head around how the forEach loop works, and now JS is (ifnally) starting to click with me. Again, thank you, and all the best!!

@javohir1704 5 ай бұрын

just restart

@AdamGassouma 3 ай бұрын

I did this : let username = ["Mr","Adam","Gassouma"]; let full = username.reduce(fullname); console.log(full); function fullname(previous,next){ return previous+" " + next; }

@Mochinori99 4 ай бұрын

This video is absolutely brilliant and so so clear. I love your videos. Thank you.

@devl0ver666 4 ай бұрын

now i know why your channel name is bro code ................. :)

@cyberblitz 5 ай бұрын

shame you didn't include the initial value parameter too. Otherwise, very educational.

@piotrmazgaj Ай бұрын

This is my seal. I have watched the entire video, understood it, and I can explain it in my own words, thus I have gained knowledge. This is my seal.

@RayhanAsif22 6 ай бұрын

Dude I've learned a lot from your videos !!

@t.antonyjaneaustus3184 Ай бұрын

Very good explaination dude..its more help full to me

@zrotrasukha8733 8 ай бұрын

Thank you brother, you helped me a lot, May god bless you !!

@MikeCode-iy9sb 3 ай бұрын

very good explaination. thanksSoMuch~

@javohir1704 5 ай бұрын

would be a way better if you added a initialValue parameter but thank you though

@vakyz5333 2 ай бұрын

I rarely comment. You're awesome!

@nomanbangtan4120 11 ай бұрын

Bro you should do a project video.

@greengraphics5060 8 ай бұрын

Do a node js video

@pexhay4690 11 ай бұрын

is there any difference between defining the callback that way and using arrow notation inside reduce like prices.reduce((accum, el) =>{...})

@ianfrye8988 11 ай бұрын

For the most part no, just depends on if you’re going to reuse that function… when you get into the “this” keyword it does depending on the context

@pexhay4690 10 ай бұрын

@@ianfrye8988 thank you

@constdev_ 3 ай бұрын

//Using Arrow Function: //Arrow Function is awesome :D const grades = [70, 65, 75, 89, 94]; const maximum = grades.reduce((previous, next) => Math.min(previous, next)); console.log(maximum);