reduce.js

// two way to shorten an array
let s = '123456'

// reduce
// list => single num/string
let sum = [1, 2, 3, 4, 5].reduce((a, b) => a + b)
// list => a single num
let biggest = [...s].reduce((a, b) => Math.max(a, b))

// filter 
// array => shorter array
let biggerThan3 = [...s].filter((val) => val > 3) //return a array


console.log(sum)
console.log(biggest)
console.log(biggerThan3)