reduce method in react code example

Example 1: reduce method in javascript array of bjects

var arr = [{x:1}, {x:2}, {x:4}];
arr.reduce(function (acc, obj) { return acc + obj.x; }, 0); // 7
console.log(arr);

Example 2: syntax of reduce in js

[1,2,3,4,5].reduce((acc, current)=>acc+current, 0)