1+ const user = {
2+ name : "Nynne" ,
3+ nickname : "nice" ,
4+ age : 33 ,
5+ nationality : "DK" ,
6+ gender : "woman" ,
7+ languages : [ "DK" , "EN" , "DE" , "JavaScript" , "Ruby" ] ,
8+ education : "university" ,
9+ isMarried : false ,
10+ friends : {
11+ bestFriends : [ "gizem" , "Rasmus" ] ,
12+ acquaintences : [ "christopher" , "birte" ]
13+ }
14+ }
15+
16+ const user2 = {
17+ name : "Rasmus" ,
18+ nickname : "Rassi" ,
19+ age : 29 ,
20+ nationality : "DK/EN" ,
21+ gender : "man" ,
22+ languages : [ "DK" , "EN" , "DE" , "JavaScript" , "Ruby" , "Python" , "MATLAB" , "C/C++" , "Julia" , "PHP" , "Java" ] ,
23+ education : "PhD" ,
24+ isMarried : false ,
25+ friends : {
26+ bestFriends : [ "Mark" , "Nynne" ] ,
27+ acquaintences : [ "Christopher" , "Marie" ]
28+ }
29+ }
30+
31+ const user3 = {
32+ name : "Marie" ,
33+ nickname : "M" ,
34+ age : 31 ,
35+ nationality : "DK" ,
36+ gender : "woman" ,
37+ languages : [ "DK" , "EN" , "ES" ] ,
38+ education : "university" ,
39+ isMarried : false ,
40+ friends : {
41+ bestFriends : [ "Thomas" , "Rasmus" ] ,
42+ acquaintences : [ "Christopher" , "Nynne" ]
43+ }
44+ }
45+
46+ // const isGreetedFormally = false
47+
48+ // let key;
49+ // if(isGreetedFormally){
50+ // key = 'name'
51+ // // console.log(`Hello, ${user.name}`)
52+ // }else{
53+ // key = 'nickname'
54+ // // console.log(`Hello, ${user.nickname}`)
55+ // }
56+
57+ // console.log(`Hello, ${user[key]}`)
58+ // // console.log(`Hello, ${user.nickname}`) // ERROR
59+
60+ // console.log(`Hello, ${user[key]}`)
61+
62+ // console.log(user)
63+ // delete user.age
64+ // console.log(user)
65+
66+ // console.log(user['friends']['acquaintences'])
67+ // console.log(user.friends.acquaintences)
68+
69+ // console.log(user['friends'].acquaintences)
70+ // console.log(user.friends['acquaintences'])
71+
72+ // console.log({name:'Rasmus',age:29}.name)
73+
74+ // console.log(user.languages[user.languages.length-1])
75+ // console.log(user["languages"][user.languages.length-1])
76+
77+ const users = [ user , user2 , user3 ]
78+
79+ let sum = 0 ;
80+ for ( let i = 0 ; i < users . length ; i ++ ) {
81+ console . log ( `Name: ${ users [ i ] . name } )
82+ console . log ( `Age: ${ users [ i ] . age } )
83+ sum += users [ i ] . age
84+ }
85+ const avg = sum / users . length
86+ console . log ( avg )
87+
88+ // Cool stuff:
89+ const otherAvg = users . reduce ( function ( sum , user ) {
90+ return sum += user . age
91+ } , 0 ) / users . length ;
92+ console . log ( otherAvg )
93+
94+ // For loop through all the users
95+ // and collect all the languages from all users
96+ // but skip duplicates
97+ // Hint: google "javascript array includes"
98+ // const allLanguages = []
99+ // for(let i = 0; i < users.length; i++){
100+ // // users[i]
101+ // // console.log(users[i].name)
102+ // for(let j = 0; j < users[i].languages.length; j++){
103+ // // console.log(users[i].languages[j])
104+ // if(!allLanguages.includes(users[i].languages[j])){
105+ // allLanguages.push(users[i].languages[j])
106+ // }
107+ // }
108+ // }
109+ // console.log(allLanguages)
110+
111+ let allLanguages = [ ]
112+ for ( let i = 0 ; i < users . length ; i ++ ) {
113+ allLanguages = allLanguages . concat ( users [ i ] . languages ) ;
114+ }
115+ const mySet = new Set ( allLanguages ) ;
116+ console . log ( Array . from ( mySet ) )
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