![]() But, the peek function returns null and doesn’t throw any error. The primary difference between both these functions is that element throws a NoSuchElementException if there are no elements available in the Queue to fetch. Unlike the poll function, these functions don’t remove the element from the queue. ![]() You can use either element, or peek function to get the element from the queue. Linked List Kotlin Queue get element without removing ![]() Println(removedElement + " : " + studentQueue)ģ.2. Val removedElement = studentQueue.remove() Val studentQueue: Queue = LinkedList(mutableListOf("Agni")) But, the poll function returns null and doesn’t throw an error. The primary difference between both these functions is that remove throws a NoSuchElementException if there are no elements available in the Queue to remove. You can use either remove or poll functions to remove and return the element from the queue. Linked List Kotlin Queue remove and get element However, this function will work for Deque.ģ.1. When you try to call addFirst method on your queue to add the element at the front, it will show the error “ Unresolved reference: addFirst“. You cannot add an element at the starting of the Queue. Val studentQueue: Queue = LinkedList(mutableListOf("Agni", "Bob", "Chris", "David", "Emily")) For example, the below studentQueue is a Queue object that supports adding elements only at the rear end and removing the element only from the front end. ![]() You can create an Queue object from the LinkedList implementation. The PriorityQueue, a subclass of AbstractQueue stores the elements internally according to their natural order based on their Comparable implementation or according to a Comparator passed to the PriorityQueue. Thus, makes the insertion and removal faster. The LinkedList are much standard queue implementation and it stores the queue elements in a standard linked list data structure. However, you can make the Linked List behave as Queue which we will discuss in the next section. A deque, a double-ended queue in which you can add or remove elements from both the ends (rear and front). As shown in the above diagram, the LinkedList is the implementation of Deque and Queue. ![]()
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