let myString = "Hello, World!";
let myRegex = /Hello/;
let result = myRegex.test(myString); // result === true

const animals = ['hippo', 'tiger', 'lion', 'seal', 'cheetah', 'monkey', 'salamander', 'elephant'];

const startsWithS = animals.findIndex(animal => {
  return animal[0] === 's' ? true : false;
});

console.log(startsWithS);

const randomNumbers = [375, 200, 3.14, 7, 13, 852];

// Call .filter() on randomNumbers below
const smallNumbers = randomNumbers.filter(numbers => {
  return numbers < 250;
});

console.log(smallNumbers);

const favoriteWords = ['nostalgia', 'hyperbole', 'fervent', 'esoteric', 'serene'];


// Call .filter() on favoriteWords below
const longFavoriteWords = favoriteWords.filter(words => {
  return words.length > 7;
});

console.log(longFavoriteWords);

// Primera forma

const groceries = ['brown sugar', 'salt', 'cranberries', 'walnuts'];

groceries.forEach(function(groceryItem){
  console.log(' - ' + groceryItem);
});

// Segunda forma

groceries.forEach(groceryItem => console.log(groceryItem));

// Tercera forma

function printGrocery(element){
  console.log(element);
}
 
groceries.forEach(printGrocery);

const groceryList = ['orange juice', 'bananas', 'coffee beans', 'brown rice', 'pasta', 'coconut oil', 'plantains'];

const pastaIndex = groceryList.indexOf('pasta');

console.log(pastaIndex);

const groceryList = ['orange juice', 'bananas', 'coffee beans', 'brown rice', 'pasta', 'coconut oil', 'plantains'];

groceryList.shift();
console.log(groceryList);

groceryList.unshift('popcorn');
console.log(groceryList);

console.log(groceryList.slice(1,4));

console.log(groceryList);