eggheadio-projects/understand-javascript-arrays: null

.DS_Store

# understand-javascript-arrays

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Plunker</title>
</head>
<body>
	<script src="script.js"></script>
</body>
</html>

// see console for output!

const items = [
    {
        active: true,
        firstname: 'Shane',
        lastname: 'Osbourne'
    },
    {
        active: true,
        firstname: 'Sally',
        lastname: 'Osbourne'
    },
    {
        active: false,
        firstname: 'Ben',
        lastname: 'Barker'
    }
];

const mapped = items
    .filter(x => x.active)
    .map(x => x.firstname);

function createHtmlList(items) {
    const listElements = items.map(x => ` <li>${x}</li>`).join('');
    return `<ul>${listElements}</ul>`;
}

console.log(createHtmlList(mapped)) || displayInPreview(createHtmlList(mapped))

// display in plunker preview
function displayInPreview(string) {
  var newDiv = document.createElement("div");
  var newContent = document.createTextNode(string);
  newDiv.appendChild(newContent);
  document.body.appendChild(newDiv)
}