user
object contains three keys. The data
key contains five keys, one of which contains an array of friends
. From this, you can see how flexible objects are as data structures. We've started writing a function addFriend
. Finish writing it so that it takes a user
object and adds the name of the friend
argument to the array stored in user.data.friends
and returns that array.
user
object should have name
, age
, and data
keys.
testString: assert('name' in user && 'age' in user && 'data' in user);
- text: The addFriend
function should accept a user
object and a friend
string as arguments and add the friend to the array of friends
in the user
object.
testString: assert((function() { let L1 = user.data.friends.length; addFriend(user, 'Sean'); let L2 = user.data.friends.length; return (L2 === L1 + 1); })());
- text: addFriend(user, "Pete")
should return ["Sam", "Kira", "Tomo", "Pete"]
.
testString: assert.deepEqual((function() { delete user.data.friends; user.data.friends = ['Sam', 'Kira', 'Tomo']; return addFriend(user, 'Pete') })(), ['Sam', 'Kira', 'Tomo', 'Pete']);
```