Advanced Node.js Development

Filling the getUserList

Now in order to fill out getUserList, we're going to start by finding all of the users whose room matches the room argument specified. In order to do that we're going to use the filter method on arrays, which we've used in the past. Let's make a variable, we'll call it users and we'll set it equal to this.users, which is the array of users.filter:

getUserList (room) {
  var users = this.users.filter((user) => {
 
  })
}

Now if you remember filter takes a function as its argument. This function gets called with each individual user. We can return true to keep this item in the array or we can return false to have it removed from the array. I'm going to go ahead and return user.room, and we're going to check if that equals, ...