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Reverse list SQL Java C++ C# Python PHP

Reverse list SQL Java C++ C# Python PHP

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
Problem 1PE
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PYTHON DOUBLE LINK  LIST

You may also use this diagram as a guide for developing your program. Please note that you don't have to implement the print-forward method as shown in the diagram below. Glass Node(object <def_init_(self) items = doubly_ linked_list0. def init (self, data=None, next=None, prev=None) class doubly_ Jinked_list(object) def iter(self def print_foward(self def reverse(self def append_item(self, datā) self. head = None self.tail = None self.count = 0 KEnd current = self, head items.append_item(PHP) items.append item(Python) items. append item('C#) items. append item('C++) items. append item(Java) items. append_item(SQL) print("Reverse list ") items.reverse0 items.print_foward) End for node in self. iter0 current = self, head self.data = data self.next = next self.prev = prev new item = Node(data, None, None) End for KEnd current ? current ? End print(node) KEnd self. head is None ? No Yes No Yes item val = current.data Endlcurrent = current.next yield item val temp = current.next current.next = current.prev current.prev = temp current = current.prev Yes No temp = self.head self.head = self.tail self.tail = temp KEnd self.head = new item self.tail = self. head new item.prev = self.tail self.tail.next = new item self.tail = new item End self.count += 1 KEnd
Transcribed Image Text:You may also use this diagram as a guide for developing your program. Please note that you don't have to implement the print-forward method as shown in the diagram below. Glass Node(object <def_init_(self) items = doubly_ linked_list0. def init (self, data=None, next=None, prev=None) class doubly_ Jinked_list(object) def iter(self def print_foward(self def reverse(self def append_item(self, datā) self. head = None self.tail = None self.count = 0 KEnd current = self, head items.append_item(PHP) items.append item(Python) items. append item('C#) items. append item('C++) items. append item(Java) items. append_item(SQL) print("Reverse list ") items.reverse0 items.print_foward) End for node in self. iter0 current = self, head self.data = data self.next = next self.prev = prev new item = Node(data, None, None) End for KEnd current ? current ? End print(node) KEnd self. head is None ? No Yes No Yes item val = current.data Endlcurrent = current.next yield item val temp = current.next current.next = current.prev current.prev = temp current = current.prev Yes No temp = self.head self.head = self.tail self.tail = temp KEnd self.head = new item self.tail = self. head new item.prev = self.tail self.tail.next = new item self.tail = new item End self.count += 1 KEnd
Write a Python program to create a doubly-linked list. Append some items on the doubly-link list. Example: items.append_item('PHP') items.append_item('Python') items.append_item('C#') items.append_item('C++') items.append_item('Java') items.append_item('SQL') The program outputs the items by iterating through the list (in reverse order). Sample Output: Reverse list SQL Java C++ C# Python PHP
Transcribed Image Text:Write a Python program to create a doubly-linked list. Append some items on the doubly-link list. Example: items.append_item('PHP') items.append_item('Python') items.append_item('C#') items.append_item('C++') items.append_item('Java') items.append_item('SQL') The program outputs the items by iterating through the list (in reverse order). Sample Output: Reverse list SQL Java C++ C# Python PHP
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