comparing different values of two arrays and returning one filtered array in JavaScript

Question

I am trying to compare the values of two different arrays, if the user.id of the volunteer iteration matches the id of the userVolunteer iteration, I want that entry to be filtered out of the volunteers array

current attempt:

  const newBirds = volunteers.filter((volunteer) => {
    return volunteer.user_id !== userVolunteers.some((vol) => vol.id)
  });

newBirds currents returns the volunteers array without filtering any of the entries? Any advice?

Answer 1

You need to put the logic of comparison inside the some callback:

const newBirds = volunteers.filter((volunteer) => {
  return userVolunteers.some((vol) => volunteer.user_id !== vol.id)
});