map_filter_reduce.js

const users = [
    {
        id: 1,
        name: 'ryan',
        email: 'ryan@codeup.com',
        languages: ['clojure', 'javascript'],
    },
    {
        id: 2,
        name: 'luis',
        email: 'luis@codeup.com',
        languages: ['java', 'scala', 'php'],
    },
    {
        id: 3,
        name: 'zach',
        email: 'zach@codeup.com',
        languages: ['javascript', 'bash'],
    },
    {
        id: 4,
        name: 'fernando',
        email: 'fernando@codeup.com',
        languages: ['java', 'php', 'sql'],
    },
    {
        id: 5,
        name: 'justin',
        email: 'justin@codeup.com',
        languages: ['html', 'css', 'javascript', 'php'],
    },
];

// using .filter to create an array where each user has at least 3 languages in the languages array

let moreThanThree = users.filter(user => user.languages.length >= 3);
console.log(moreThanThree);

// using .map to create an array of strings where each element is a user's email address

let emailAddress = users.map(user => user.email);
console.log(emailAddress);

// using .reduce to transform the array into an object where the object's keys are ids and the values are objects that represent each user

let reducedUsers = users.reduce((newObject, user) => {

 newObject[user.id] = user;
 return newObject;

}, {});


console.log(reducedUsers);