function Queue() {
  let first = null;
  
  const push = function(value) {
    const newNode = new Node(value);
    newNode.next = first;
    first = newNode;
  }
  
  const get = function() {
    const firstNode = first;

    if(getIsEmpty()) {
      throw new Error('Queue is empty');
    }

    first = firstNode.next;
    return firstNode.value;
  }
  
  const getIsEmpty = function() {
    return first === null
  }

  return {
    push,
    get,
    getIsEmpty
  }
}

```js function Queue() { let first = null; const push = function(value) { const newNode = new Node(value); newNode.next = first; first = newNode; } const get = function() { const firstNode = first; if(getIsEmpty()) { throw new Error('Queue is empty'); } first = firstNode.next; return firstNode.value; } const getIsEmpty = function() { return first === null } return { push, get, getIsEmpty } } ```