dropWhile method

[code0943083546]

var users = [
  { 'user': 'barney',  'active': false },
  { 'user': 'john',  'active': false },
  { 'user': 'fred',    'active':true },
  { 'user': 'pebbles', 'active': true }
];

let drop = (array, n=1) => {
    return array.slice(n)
  }
    const dropWhile = (array, predicate) => {
    const cb = (element, index) => 
{console.log(element,index)
      return !predicate(element, index, array);
    };
    let dropNumber = array.findIndex(cb);
    console.log(dropNumber)
    let droppedArray = drop(array, dropNumber);
    return droppedArray;
  }
 
dropWhile(users, function(o) { return !o.active; });

I have problems understanding this. Could someone please explain me how this work? Even call to dropWhile with this return is confusing me. I understood every other method we did in lodash exercise but this is really troubling me