reduce mdn

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Michela
07 Aug 2019
1var array = [36, 25, 6, 15];
2
3array.reduce(function(accumulator, currentValue) {
4  return accumulator + currentValue;
5}, 0); // 36 + 25 + 6 + 15 = 82
Lisa
20 Feb 2018
1const sum = array.reduce((accumulator, element) => {
2  return accumulator + element;
3}, 0);
4// An example that will loop through an array adding
5// each element to an accumulator and returning it
6// The 0 at the end initializes accumulator to start at 0
7// If array is [2, 4, 6], the returned value in sum
8// will be 12 (0 + 2 + 4 + 6)
9
10const product = array.reduce((accumulator, element) => {
11  return accumulator * element;
12}, 1);
13// Multiply all elements in array and return the total
14// Initialize accumulator to start at 1
15// If array is [2, 4, 6], the returned value in product
16// will be 48 (1 * 2 * 4 * 6)
Nico
17 May 2019
1Sum array elements:
2let myArr = [1,2,3,-1,-34,0]
3return myArr.reduce((a,b) => a + b,0)
Noah
21 Jan 2017
1 let sum = arr.reduce((curr, index) => curr + index);
Alessandro
29 Jan 2017
1let newArray = array.reduce( (acc, element, index, originalArray) => {
2    // return acc += element
3}, initialValue)
Martín
06 Apr 2020
1arr.reduce(callback( accumulator, currentValue[, index[, array]] )[, initialValue])
2
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