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

reduce method

Add Answer

kepl3r answered on September 9, 2020 Popularity 10/10 Helpfulness 2/10

answer reduce method

related reduce function in js

related reduce()

related Using Array.reduce() method

related js .reducer method

related JavaScript Array Methods .reduce()

related THE REDUCE() METHOD IN JAVASCRIPT

related reduce in js

related reduce method

reduce method

Comment

The reduce() method executes a reducer function (that you provide) on each element of the array, resulting in single output value.

The reducer function takes four arguments:
Accumulator (acc)
Current Value (cur)
Current Index (idx)
Source Array (src)

//syntax
arr.reduce(callback( accumulator, currentValue, [, index[, array]] )[, initialValue])
//example flatten an array

let flattened = [[0, 1], [2, 3], [4, 5]].reduce(
  ( accumulator, currentValue ) => accumulator.concat(currentValue),
  []
)

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: developer.mozilla.org

Tags: javascript reduce

Link to this answer
Share Copy Link

Contributed on Sep 09 2020

kepl3r

0 Answers Avg Quality 2/10

Closely Related Answers

reduce function in js

Comment

let arr = [1, 2, 3, 4, 5];
let newArr = arr.reduce((item1,item2) => {
    return item1 + item2;
})

console.log(newArr)
// output 15
// 1+2+3+4+5

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: function functio

Link to this answer
Share Copy Link

Contributed on Feb 09 2023

Muhammad Rayyan

0 Answers Avg Quality 2/10

reduce()

Comment

const array1 = [1, 2, 3, 4];
const reducer = (accumulator, currentValue) => accumulator + currentValue;

// 1 + 2 + 3 + 4
console.log(array1.reduce(reducer));
// expected output: 10

// 5 + 1 + 2 + 3 + 4
console.log(array1.reduce(reducer, 5));
// expected output: 15

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jan 17 2021

putsan

0 Answers Avg Quality 2/10

Using Array.reduce() method

Comment

// define a reusable function
const calculateSum = (arr) => {
    return arr.reduce((total, current) => {
        return total + current;
    }, 0);
}

// try it
console.log(calculateSum([1, 2, 3, 4, 5]));

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: www.kindacode.com

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Aug 29 2022

Lucky Lizard

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

JavaScript Array Methods .reduce()

Comment

const list = [1, 2, 3, 4, 5];
console.log(list.reduce((number, nextNumber) => number + nextNumber));
// --> 15

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: github.com

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on May 07 2021

Hilarious Hippopotamus

0 Answers Avg Quality 2/10

THE REDUCE() METHOD IN JAVASCRIPT

Comment

/*
This method takes a callback that takes two parameters,
one that represents the element from the last iteration and the other is the current
element of the iteration
*/

let nums = [2,4,6,8,3,5]

let result = nums.reduce((prev,curr)=>prev+curr)
console.log(result); // 28

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: blog.devgenius.io

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jul 10 2022

OHIOLee

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

reduce in js

Comment

n JavaScript, the reduce() method is used to apply a function to each element of an array and reduce it to a single value. The reduce() method takes two parameters: a callback function and an optional initial value.

Here is the basic syntax of the reduce() method:

'array.reduce(callback, initialValue)'

The callback function takes four parameters: accumulator, currentValue, currentIndex, and array. The accumulator is the value returned from the previous invocation of the callback, or the initialValue if provided. The currentValue is the current element being processed, currentIndex is the index of the current element, and array is the array on which reduce() was called.

The reduce() method executes the callback function once for each element in the array (excluding the initial value if provided), and the return value of the callback becomes the new value of the accumulator.

Here is an example that demonstrates the usage of reduce() to calculate the sum of an array of numbers:

const numbers = [1, 2, 3, 4, 5];

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

console.log(sum); // Output: 15


In the example above, the reduce() method is called on the numbers array. The callback function takes two parameters, accumulator and currentValue, and simply adds them together. The initial value of the accumulator is set to 0 using the second argument of reduce(). The final result, 15, is the sum of all the numbers in the array.

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jun 19 2023

Strange Shrew

0 Answers Avg Quality 2/10

reduce in js

Comment

reduce in js with a previous accumulator value

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

var p=array.reduce(function(accumulator, currentValue,index,arr) {
  return accumulator+=currentValue;
},8); // 36 + 25 + 6 + 15 = 82
 console.log(p);

here accumulator previously accumulate value 8

Popularity 9/10 Helpfulness 2/10 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

reduce method

Comment

function reduce(array, combine, start) {
  let current = start;
  for (let element of array) {
    current = combine(current, element);
  }
  return current;
}

console.log(reduce([1, 2, 3, 4], (a, b) => a + b, 0));
// → 10

Popularity 10/10 Helpfulness 2/10 Language css

Source: eloquentjavascript.net

Tags: css

Link to this answer
Share Copy Link

Contributed on Oct 01 2021

Xanthous Xenomorph

0 Answers Avg Quality 2/10

reduce method

Contents

More Related Answers

reduce method

Closely Related Answers

reduce function in js

reduce()

Using Array.reduce() method

js .reducer method

JavaScript Array Methods .reduce()

THE REDUCE() METHOD IN JAVASCRIPT

reduce in js

reduce in js

reduce in js

reduce method

Grepper

Documentation

Social

Legal

Contact

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