prototype reduce code example
Example 1: reduce javascript
const sum = array.reduce((accumulator, element) => {
return accumulator + element;
}, 0);
const product = array.reduce((accumulator, element) => {
return accumulator * element;
}, 1);
Example 2: reduce()
const array1 = [1, 2, 3, 4];
const reducer = (accumulator, currentValue) => accumulator + currentValue;
console.log(array1.reduce(reducer));
console.log(array1.reduce(reducer, 5));
Example 3: .reduce mdn
arr.reduce(callback( accumulator, currentValue[, index[, array]] )[, initialValue])