map-filter-reduce.js

// map
var animals = ['ayam', 'sapi', 'bebek']

function digoreng(daging) {
  return daging + ' goreng'
}

// var foods = animals.map(digoreng)
var foods = animals.map(function(daging) {
  return daging + ' goreng'
})

console.log(foods)

// filter
var numbers = [1, 3, 6, 7, 8, 9]

function isEvenNumber(n) {
  return n % 2 === 0
}

var evenNumbers = numbers.filter(isEvenNumber)
console.log('evenNumbers', evenNumbers)