true

false

undefined

Error

true

false

undefined

Error

['id' ,'firstName', 'lastName', 'role', 'isAdmin']

['id', 'firstName', 'lastName']

['id', 'firstName']

['firstName', 'lastName', 'role', 'isAdmin']

['firstName', 'lastName']

['firstName']

['firstName', 'role']

['id', 'firstName', 'role']

hello will be printed once

hello will be printed every second

hello will not be printed

1

2

undefined

Error

Hello

Greeting {}

Promise { 'Hello' }

Error

Hello

Greeting {}

Promise { 'Hello' }

undefined

Error

1

2

undefined

Error

Tom Cruise, Tom Cruise

Tom Cruise, Johnny Depp

Johnny Depp, Johnny Depp

Error

Tom Cruise

Johnny Depp

undefined

Error