Breaking News: Grepper is joining You.com. Read the official announcement!

JavaScript Reducer

Add Answer

ashiq ahmed answered on May 21, 2020 Popularity 9/10 Helpfulness 2/10

answer JavaScript Reducer

related javascript reduce

related JavaScript Reduce

related js reduce

related reduce javascript

related reduce in js

related javascript reduce

related js .reducer method

related js reduce

related javascript reduce

JavaScript Reducer

Comment

const reviews = [4.5, 4.0, 5.0, 2.0, 1.0, 5.0, 3.0, 4.0, 1.0, 5.0, 4.5, 3.0, 2.5, 2.0];
const reviewsLetter = ['c', 'd', 'f', 'a', 'g', 'a', 'd', 'f', 'e', 'b'];
// 1. Using the reduce function, create an object that// has properties for each review value, where the value// of the property is the number of reviews with that score.// for example, the answer should be shaped like this:// { 4.5: 1, 4: 2 ...}
const countGroupedByReview = reviewsLetter.reduce(groupBy, {});
function groupBy (acc, review){  
  const count = acc[review] || 0;  
  return {...acc, [review]: count + 1}}
console.log(countGroupedByReview);

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: jsbin.com

Tags: javascript

Link to this answer
Share Copy Link

Contributed on Aug 08 2022

ashiq ahmed

0 Answers Avg Quality 2/10

Closely Related Answers

javascript reduce

Comment

185

var array = [36, 25, 6, 15];

array.reduce(function(accumulator, currentValue) {
  return accumulator + currentValue;
}, 0); // 36 + 25 + 6 + 15 = 82

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on May 21 2020

TC5550

0 Answers Avg Quality 2/10

JavaScript Reduce

Comment

const arr = [1, 2, 3]
const result = arr.reduce((acc, curr) => acc + curr, 0)
// 1 + 2 + 3 = 6
console.log(result)

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Dec 21 2022

Jozvan

0 Answers Avg Quality 2/10

js reduce

Comment

// syntax: array.reduce(function, accumulator-initial-value)
let array = [3, 7, 2, 9, 5]
const result = array.reduce((accumulator, currentValue, currentIndex, arr) => {
  // code
}, initialValue)

// accumulator = will store return value of the function
// currentValue = iterate through each array element
// currentIndex = index of currentValue
// arr = original array
// initialValue = set accumulator initial value

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jul 21 2021

Suman Majhi

0 Answers Avg Quality 2/10

reduce javascript

Comment

let array = [36, 25, 6, 15];
 
array.reduce((acc, curr) => acc + curr, 0)
// 36 + 25 + 6 + 15 = 82

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jul 05 2022

Rick Oburu

0 Answers Avg Quality 2/10

reduce javascript

Comment

var depthArray = [1, 2, [3, 4], 5, 6, [7, 8, 9]];

depthArray.reduce(function(flatOutput, depthItem) {
    return flatOutput.concat(depthItem);
}, []);

=> [1, 2, 3, 4, 5, 6, 7, 8, 9];


// --------------
const prices = [100, 200, 300, 400, 500];
const total = prices.reduce((total, cur) => {return total + cur} )
//  init value = 0 => total = 1500;


// --------------
const prices = [100, 200, 300, 400, 500];
const total = prices.reduce(function (total, cur) => {
                   return total + cur
                }, 1 )
// init value = 1 => so when plus all numnber will be result => 1501;

// --------------
const prices = [100, 200, 300, 400, 500];
const total = prices.reduce((total, cur) => total + cur )
// 1500;

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Mar 03 2022

Zidane (Vi Ly - VietNam)

0 Answers Avg Quality 2/10

reduce in js

Comment

Reduce in js

let arr=[5,6,2];
let sum=arr.reduce((accumulator,current,index,arr)=>{
   return accumulator+=current;
});
console.log(sum);//5+6+13

accumulator acumulate(hold) the sum output

reduce methood creat a new array and does not change actual array

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on May 19 2023

pabel reja

0 Answers Avg Quality 2/10

javascript reduce

Comment

const sum = array.reduce((accumulator, element) => {
  return accumulator + element;
}, 0);

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Apr 11 2021

Cooperative Capybara

0 Answers Avg Quality 2/10

js .reducer method

Comment

const arrayOfNumbers = [1, 2, 3, 4];
 
const sum = arrayOfNumbers.reduce((accumulator, currentValue) => {  
  return accumulator + currentValue;
});
 
console.log(sum); // 10

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: www.codecademy.com

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Feb 20 2022

Healthy Hamerkop

0 Answers Avg Quality 2/10

js reduce

Comment

Sum array elements:
let myArr = [1,2,3,-1,-34,0]
return myArr.reduce((a,b) => a + b,0)

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Dec 27 2020

Encouraging Earthworm

0 Answers Avg Quality 2/10

javascript reduce

Comment

[3, 2.1, 5, 8].reduce((total, number) => total + number, 0)

// loop 1: 0 + 3
// loop 2: 3 + 2.1
// loop 3: 5.1 + 5
// loop 4: 10.1 + 8
// returns 18.1

Popularity 10/10 Helpfulness 3/10 Language typescript

Source: dev.to

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Aug 10 2021

Troubled Tiger

0 Answers Avg Quality 2/10

JavaScript Reducer

Contents

More Related Answers

JavaScript Reducer

Closely Related Answers

javascript reduce

JavaScript Reduce

js reduce

reduce javascript

reduce javascript

reduce in js

javascript reduce

js .reducer method

js reduce

javascript reduce

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.