reduce method in array javascript code example
Example 1: how to flatten array with reduce in javascript
let flattened = [[0, 1], [2, 3], [4, 5]].reduce(
function(accumulator, currentValue) {
return accumulator.concat(currentValue)
},
[]
)
Example 2: reduce object to array javascript
var arr = [{x:1},{x:2},{x:4}];
arr.reduce(function (a, b) {
return {x: a.x + b.x};
})
arr.reduce((a, b) => ({x: a.x + b.x}));
Example 3: reduce javascript
const initialValue = 0;
const numbers = [5, 10, 15];
const reducer = (accumulator, item) => {
return accumulator + item;
};
const total = numbers.reduce(reducer, initialValue)