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Implement removeFirst for a doubly linked list

Implement removeFirst for a doubly linked list

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Implement removeFirst for a doubly linked list

8 } no usages new @Test /**This test checks the correct implementation of the removeFirst method. */ public void removeFirst Test() { Deque<Integer> deque = new Linked List Deque<> (); deque.addFirst ( x: 1); deque.addFirst(x: 2); deque.addLast(x: 3); } I Integer removed Element = deque.removeFirst(); assert That (removed Element).is EqualTo( expected: 2); assert That (deque.size()).is EqualTo( expected: 2); assert That (deque.get (0)).is EqualTo( expected: 1); assert That (deque.get (1)).is EqualTo( expected: 3); assert That (deque.toList()). contains Exactly(...varargs: 1,3).inOrder();
Transcribed Image Text:8 } no usages new @Test /**This test checks the correct implementation of the removeFirst method. */ public void removeFirst Test() { Deque<Integer> deque = new Linked List Deque<> (); deque.addFirst ( x: 1); deque.addFirst(x: 2); deque.addLast(x: 3); } I Integer removed Element = deque.removeFirst(); assert That (removed Element).is EqualTo( expected: 2); assert That (deque.size()).is EqualTo( expected: 2); assert That (deque.get (0)).is EqualTo( expected: 1); assert That (deque.get (1)).is EqualTo( expected: 3); assert That (deque.toList()). contains Exactly(...varargs: 1,3).inOrder();
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