//forEach()
// for loop
for (let i = 0; i < companies.length; i++) {
  console.log(companies[i]);
}

// forEach()
companies.forEach(function(company) {
console.log(company);
});
// forEach() Arrow Function
companies.forEach(company => console.log(company))


// filter()
// get 21 and older
/* let canDrink = [];
for (let i = 0; i < ages.length; i++) {
  if (ages[i] >= 21) {
    canDrink.push(ages[i]);
  }
} */

/* const canDrink = ages.filter(function(age) {
  if (age >= 21) {
    return true;
  }
}); */

const canDrink = ages.filter(age => age >= 21);

// map()
// Create array of company names
const companyNames = companies.map(function(company) {
  return company.name;
});
console.log(companyNames);

const agesSquare = ages.map(age => Math.sqrt(age));
const agesTimesTwo = ages.map(age => age * 2);

const ageMap = ages.map(age => Math.sqrt(age)).map(age => age * 2);

// sort()
// sort companies by start Year
const sortedCompanies = companies.sort(function(c1, c2) {
  if (c1.start > c2.start) {
    return 1;
  } else {
  }
  return -1;
});

const sortedCompanies = companies.sort((a, b) => (a.start > b.start ? 1 : -1));

// Sort Ages
const sortAges = ages.sort((a, b) => a - b);


// Combine Methods

const combined = ages
  .map(age => age * 2)
  .filter(age => age >= 40)
  .sort((a, b) => a - b)
  .reduce((a, b) => a + b, 0);

console.log(combined);