javascript ES5 - Array.prototype.reduce（）

Posted 2021-05-04

// Reduce takes in two arguments, a function and an optional starting point. 
// example 1
[1, 2, 3].reduce((prev, curr, index) => {
    console.log(prev, curr, index);
    return prev + curr;
});

// An example of a function that takes in any list of numbers as arguments
// and returns the total sum through a reduce function
function addNumbers() {
    return Array.from(arguments).reduce((a, b) => a + b);
}

const total = addNumbers(55, 399, 392, 18, 44, 98, 76, 29);
console.log(total);