1. var database = [
2.     {
3.         username: "Rafnexx",
4.         password: "passw0rd"
5.     },
6.     {
7.         username: "admin",
8.         password: "haslo"
9.     },
10.     {
11.         username: "johny",
12.         password: "haslo"
13.     },
14.     {
15.         username: "mnemonic",
16.         password: "haslo"
17.     },
18.     {
19.         username: "tibia",
20.         password: "haslo"
21.     },
22.        
23. ];
24.  
25. var newsfeed = [
26.     {
27.         username: "John",
28.         timeline: "I'm tired!"
29.     },
30.     {
31.         username: "Szymon",
32.         timeline: "That's so exciting!"
33.     },
34.     {
35.         username: "Patryk",
36.         timeline: "Tomorrow, I'll destroy you guys!"
37.     }
38. ];
39.  
40. var userNamePrompt = prompt("What's your username?");
41. var passwordPrompt = prompt("What's your password?");
42.  
43. function checkingUserNameAndPassword(user, pass) {
44.     for(var i = 0; i <= database.length -1; i++){
45.         if( (user === database[i].username) && (pass === database[i].password) ) {
46.             return true;
47.         }
48.     }
49.         return false;
50. }
51.  
52.  
53. function signingIn() {
54.     if( checkingUserNameAndPassword(userNamePrompt, passwordPrompt) ) {
55.         console.log(newsfeed);
56.     }
57.     else {
58.         console.log("Błędna nazwa użytkownika lub hasło!");
59.     }
60. }
61.  
62. signingIn();