Working with objects! We'll write some functions that show us the power and flexibility of objects. As usual start of by:
- Fork this repo
- Clone it to your computer
- run
npm install
- run
jest
orjest --watch-all
to run the tests
Write a function, isAdmin
that takes in a user object and returns true if the user is an admin,
as indicated by their userRole
key. All admins' userRole
attributes are equal to 'ADMIN'
.
A user object will look like this:
{
firstName: String,
lastname: String,
userRole: String
}
Examples
isAdmin({
firstName: 'Eileen',
lastName: 'Smith',
userRole: 'REGULAR_USER'
})
=> false
isAdmin({
firstName: 'Ian',
lastName: 'Rogers',
userRole: 'USER_MANAGER'
})
=> false
isAdmin({
firstName: 'Jeff',
lastName: 'Wilson',
userRole: 'ADMIN'
})
=> true
Write a function, getEmail
, that given a user object, return the users' Code Immersives email. We'll assume that
a Code Immersives email is always in [email protected]
form.
Examples
getEmail({
firstName: 'Brian'
lastName: 'Carela'
})
=> '[email protected]'
getEmail({
firstName: 'Anthony',
lastName: 'DeRosa'
})
=> '[email protected]'
Write a function, getPlaylistLength
that takes in a playlist and returns the number of songs in the playlist
A playlist object will look like this:
{
name: 'my jams',
songs: ['Vienna', 'Hey Ya!']
}
Examples
getPlaylistLength({
name: 'hits',
songs: ['The Distance', 'Ruby Tuesday', 'Old Town Road (remix)']
})
=> 3
getPlaylistLength({
name: 'empty playlist',
songs: []
})
=> 0
Write a function, getHardestHomework
that takes in an array of homework objects and returns the name of
the hardest homework assignment. The hardest homework will be the one that has the lowest average score. If the array contains no homeworks, return an empty string.
Examples
getHardestHomework([])
=> ''
getHardestHomework([
{ name: 'homework 1', averageScore: 99 },
{ name: 'homework 2', averageScore: 1 }
])
=> 'homework 2'
getHardestHomework([
{ name: 'hip-hip-array', averageScore: 12 },
{ name: 'wait-i-object', averageScore: 200 },
{ name: 'objective-reasoning', averageScore: 25 }
])
=> 'hip-hip-array'
Write a function, createPhonebook
, that creates a phonebook object from an array of names
and phone numbers.
Examples
createPhonebook(['Jimothy', 'Maria', 'Karl'], ['123-456-7890', '000-000-0000', '999-888-7766'])
=> {
'Jimothy': '123-456-7890',
'Maria': '000-000-0000',
'Karl': '999-888-7766'
}
createPhonebook(['Melissa', 'Andre'], ['206-111-2233', '321-123-2424'])
=> {
'Melissa': '206-111-2233',
'Andre': '321-123-2424'
}
createPhonebook([], []);
=> {}