Mock Users

mockusers.js

const users = [{
    id: "e0aafb31-8ac6-48d4-99ee-12af8ddcbdae",
    email: "[email protected]",
    ip_address: "53.215.156.73"
  }, {
    id: "a7b0221d-5228-4992-a964-b5f3e3d7a022",
    email: "[email protected]",
    ip_address: "34.81.219.4"
  }, {
    id: "1019b52c-db9d-45a2-975f-404455925a6a",
    email: "[email protected]",
    ip_address: "65.181.114.151"
  }, {
    id: "e8637c3b-645d-4742-a463-d2006742606f",
    email: "[email protected]",
    ip_address: "136.171.217.116"
  }, {
    id: "a20803f2-c372-4f39-97b1-d8e948151c8c",
    email: "[email protected]",
    ip_address: "220.228.4.97"
  }, {
    id: "63f8e789-009d-4e7b-ad6b-cc8c8a1d1248",
    email: "[email protected]",
    ip_address: "101.212.0.49"
  }, {
    id: "74120248-03b5-4888-84c0-d1a459c6273b",
    email: "[email protected]",
    ip_address: "28.180.205.167"
  }, {
    id: "412a0669-7171-48b4-95eb-e898993ec1dc",
    email: "[email protected]",
    ip_address: "61.44.195.62"
  }, {
    id: "6cd04ecc-8316-4542-9faa-b8438e82b4ad",
    email: "[email protected]",
    ip_address: "1.176.238.27"
  }, {
    id: "cfdf5009-84d3-4599-88c0-048c4fcae2ed",
    email: "[email protected]",
    ip_address: "44.37.119.76"
  }];
  
/**
 * Exercise 01
 * 
 * Check whether every email address in the list of users is valid (get a true or false value)
 */






/**
 * Exercise 02
 * 
 * Find out how many users have an IP address in a Class A network
 * https://en.wikipedia.org/wiki/Classful_network
 */






/**
 * Exercise 03
 * 
 * Find the position in the array of the first  user object that has a Class B IP address
 */






/**
 * Exercise 04
 * 
 * Find the user object that has the 'soundcloud' email address
 */






/**
 * Exercise 05
 * 
 * Replace all the items in the array with a string value of 'deleted'
 */

Check whether every email address in the list of users is valid(get a true or false value):

const reEmail =
    /^(([^<>()[\]\.,;:\s@\"]+(\.[^<>()[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})$/i;

var validateEmail = users.map(
    (user) => `${reEmail.test(user.email)} :${user.email} `
);
console.log(validateEmail);

Find out how many users have an IP address in a Class A network:

var A_team = users.filter((user) => user.ip_address.split(".")[0] < 128);
console.log(A_team.length);

Find the position in the array of the first user object that has a Class B IP address:

var B_team = users.findIndex(
    (user) =>
    user.ip_address.split(".")[0] >= 128 && user.ip_address.split(".")[0] < 191
);
console.log(B_team);

Find the user object that has the 'soundcloud' email address:

var findSoundCloud = users.find(
    (user) =>
    user.email.substring(
        user.email.indexOf("@") + 1,
        user.email.indexOf(".")
    ) === "soundcloud"
);
console.log(findSoundCloud);