Address Book JS Fundamentals

function addressBook(arr) {
    let addressbook = {};
    for (let line of arr) {
        let [name, address] = line.split(':');
        addressbook[name] = address;
    }
    let data = Object.entries(addressbook);
    data.sort((a, b) => a[0].localeCompare(b[0]));

    for (let [name, address] of data) {
        console.log(`${name} -> ${address}`);
    }
}