Test assignment

assignment.md

Given social network posts in the following format:

[
 {"date": "12.10.2019",
  "text": "I love trouts!",
  "likes": [1, 2, 3, 4]},
  
  {"date": "17.10.2019",
  "text": "Hello world!",
  "likes": [1, 2, 3, 4]}б
  ...
]

likes is a list of user ids that liked a post

And given users in the following format

[
  {"id": 1
   "name": "John"},
   ...
]

Find the names of the users, that liked all posts. Example:

// posts
[
  {"date": "21.12.2019",
   "text": "Fish!",
   "likes": [1, 2]},
   
   {"date": "21.12.2019",
    "text": "Apples :((",
    "likes": [1, 2, 3]}
]
//users
[
  {"id": 1,
   "name": "John"},
  {"id": 2,
   "name": "Mary"},
   {"id": 3,
   "name": "Jane"},
]

The result should be:
["Mary", "John"]

Any questions are welcome!

Useful hints

• You can use https://github.com/dakrone/cheshire to parse json files

posts.json

[
 {"id": 1,
  "date": "12.10.2019",
  "text": "I like fish.",
  "likes": [2, 3, 6]},

 {"id": 2,
  "date": "15.10.2019",
  "text": "I hate apples",
  "likes": [6, 1, 2, 3, 4]},

 {"id": 3,
  "date": "23.12.2019",
  "text": "I bought an iPhone.",
  "likes": [6, 2]},

 {"id": 4,
  "date": "02.02.2020",
  "text": "Vote for spaghetti!",
  "likes": [5, 1, 3, 6, 2]},

 {"id": 5,
  "date": "31.05.2020",
  "text": "How do you like the last Marvell movie?",
  "likes": [2, 6, 1]},

 {"id": 6,
  "date": "01.01.2022",
  "text": "I hate fish.",
  "likes": [3, 4, 6, 2]},

 {"id": 7,
  "date": "31.12.2022",
  "text": "I saw the Bigfoot on my backyard.",
  "likes": [4, 1, 2, 6]},

 {"id": 8,
  "date": "01.03.2019",
  "text": "I'm having fun in Paris",
  "likes": [1, 2, 3, 4, 5, 6]},

 {"id": 9,
  "date": "12.10.2019",
  "text": "Check out my new clojure library github.com/user/clojure-library",
  "likes": [6, 1, 2, 3, 4]}
]

users.json

[
  {"id": 1, "name": "John"},
  {"id": 2, "name": "Mary"},
  {"id": 3, "name": "Anton"},
  {"id": 4, "name": "Batman"},
  {"id": 5, "name": "Jesica"},
  {"id": 6, "name": "Ivan"},
  {"id": 7, "name": "Petra"}
]