// Convert a Nodelist to an array (imagine like selecting a <li>-list)
const list = Array.from(document.querySelectorAll('.list'));

// Convert each element in array to float
const newArray = myArray.map(item => parseFloat(item)); 

// Return each element of an array of objects as a list
// Need an array of objects
const dogs = [
    { name: 'Snickers', age: 2 },
    { name: 'Hugo', age: 8 },
    { name: 'Sunny', age: 1 }
];

// Print out all the dogs
const markup = `
    <ul class="dogs">
      ${dogs.map(dog => `
        <li>
          ${dog.name}
          is
          ${dog.age * 7}
        </li>`).join('')}
    </ul>
`;
document.body.innerHTML = markup;