Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Related questions
Question
Write a Python function `removeDuplicates(myList)` that removes duplicate values from a list. While the
for element in myList:
if <condition>:
<remove element(s) from myList> # recipe for disaster
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 2 steps with 1 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- You are going to implement a program that creates an unsorted list by using a linked list implemented by yourself. NOT allowed to use LinkedList class or any other classes that offers list functions. It is REQUIRED to use an ItemType class and a NodeType struct to solve this homework. The “data.txt” file has three lines of data 100, 110, 120, 130, 140, 150, 160 100, 130, 160 1@0, 2@3, 3@END You need to 1. create an empty unsorted list 2. add the numbers from the first line to list using putItem() function. Then print all the current keys to command line in one line using printAll(). 3. delete the numbers given by the second line in the list by using deleteItem() function. Then print all the current keys to command line in one line using printAll().. 4. putItem () the numbers in the third line of the data file to the corresponding location in the list. For example, 1@0 means adding number 1 at position 0 of the list. Then print all the current keys to command line in one…arrow_forwardWhat would be a way in implementing the Josephus problem in C++ using a vector or a list? That takes in three parameters, one the number of knights for the knight parameter. The second parameter, "skip", is the number of knights to skip and to execute the next night. Then the third parameter "start", is the index of the knight to execute first.arrow_forwardThis is in c++ Given the MileageTrackerNode class, complete main() to insert nodes into a linked list (using the InsertAfter() function). The first user-input value is the number of nodes in the linked list. Use the PrintNodeData() function to print the entire linked list. Don't print the dummy head node. Example input : 3 2.2 7/2/18 3.2 7/7/18 4.5 7/16/18 output: 2.2, 7/2/18 3.2, 7/7/18 4.5, 7/16/18 main.cpp: #include "MileageTrackerNode.h"#include <string>#include <iostream>using namespace std; int main (int argc, char* argv[]) {// References for MileageTrackerNode objectsMileageTrackerNode* headNode;MileageTrackerNode* currNode;MileageTrackerNode* lastNode; double miles;string date;int i; // Front of nodes listheadNode = new MileageTrackerNode();lastNode = headNode; // TODO: Read in the number of nodes // TODO: For the read in number of nodes, read// in data and insert into the linked list // TODO: Call the PrintNodeData() method// to print the entire linked list //…arrow_forward
- Write a python hangman program Modify your program so that the following functionality is added:1. Instead of selecting the word from a hard coded list, incorporate problem2 so that thelist is read from a file, then a word is randomly selected from this list.2. when the game ends, the following information should be outputted to a new file:● the word● the state of the hangman● if the user won or lostExample outputs:quokkaO\||You won!kangarooO\|/|/ \You lostarrow_forwardThe linked list provided below:2 > 3 > 1 > 7 > 5 > 18 > NULLHere the > symbol means a pointer.Write a complete Python program which deletes the third last node of thelist and returns to you the list as below2 > 3 > 1 > 5 > 18 > NULLThe third last node (with a value 7) has now been dislodged from the list.Here are the few things to consider :(a) We do NOT know the length of the list.(b) Your solution should be in O(n) time and O(1) space having madejust a single pass through the list.arrow_forwardIn this project, you will implement a Set class that represents a general collection of values. For this assignment, a set is generally defined as a list of values that are sorted and does not contain any duplicate values. More specifically, a set shall contain no pair of elements e1 and e2 such that e1.equals(e2) and no null elements. (in java)Requirements among all implementations there are some requirements that all implementations must maintain. • Your implementation should always reflect the definition of a set. • For simplicity, your set will be used to store Integer objects. • An ArrayList<Integer> object must be used to represent the set. • All methods that have an object parameter must be able to handle an input of null. • Methods such as Collections. the sort that automatically sorts a list may not be used. Instead, when a successful addition of an element to the Set is done, you can ensure that the elements inside the ArrayList<Integer>…arrow_forward
- Need help writing a static method in Python that does the following: Given any two lists A and B, determine if:List A is equal to list B; orList A contains list B (A is a superlist of B); orList A is contained by list B (A is a sublist of B); orNone of the above is true, thus lists A and B are unequalSpecifically, list A is equal to list B if both lists have the same values in the sameorder. List A is a superlist of B if A contains a sub-sequence of values equal to B.List A is a sublist of B if B contains a sub-sequence of values equal to A.arrow_forwardIn python. Write a LinkedList class that has recursive implementations of the add and remove methods. It should also have recursive implementations of the contains, insert, and reverse methods. The reverse method should not change the data value each node holds - it must rearrange the order of the nodes in the linked list (by changing the next value each node holds). It should have a recursive method named to_plain_list that takes no parameters (unless they have default arguments) and returns a regular Python list that has the same values (from the data attribute of the Node objects), in the same order, as the current state of the linked list. The head data member of the LinkedList class must be private and have a get method defined (named get_head). It should return the first Node in the list (not the value inside it). As in the iterative LinkedList in the exploration, the data members of the Node class don't have to be private. The reason for that is because Node is a trivial class…arrow_forwardImplement a simple linked list in Python (Write source code and show output) with basic linked list operations like: (a) create a sequence of nodes and construct a linear linked list. (b) insert a new node in the linked list. (b) delete a particular node in the linked list. (c) modify the linear linked list into a circular linked list. Use this template: class Node:def __init__(self, val=None):self.val = valself.next = Noneclass LinkedList:"""TODO: Remove the "pass" statements and implement each methodAdd any methods if necessaryDON'T use a builtin list to keep all your nodes."""def __init__(self):self.head = None # The head of your list, don't change its name. It shouldbe "None" when the list is empty.def append(self, num): # append num to the tail of the listpassdef insert(self, index, num): # insert num into the given indexpassdef delete(self, index): # remove the node at the given index and return the deleted value as an integerpassdef circularize(self): # Make your list circular.…arrow_forward
- Write a program in c++ and make sure it works, that reads a list of students (first names only) from a file. It is possible for the names to be in unsorted order in the file but they have to be placed in sorted order within the linked list.The program should use a doubly linked list.Each node in the doubly linked list should have the student’s name, a pointer to the next student, and a pointer to the previous student. Here is a sample visual. The head points to the beginning of the list. The tail points to the end of the list. When inserting consider all the following conditions:if(!head){ //no other nodes}else if (strcmp(data, head->name)<0){ //smaller than head}else if (strcmp(data, tail->name)>0){ //larger than tail}else{ //somewhere in the middle} When deleting a student consider all the following conditions:student may be at the head, the tail or in the middleBelow, you will find a sample of what the file looks like. Notice the names are in…arrow_forwardCan you write a program in python for the dining philosopher problems that do not have deadlock? You have to use semaphores and use the strategy that a philosopher only picks the fork if both (left and right) are available. def philosopher(id: int, fork: list): The main is if __name__ == "__main__": semaphoreList = list() #this list will hold one semaphore per fork Philosophers = 5 for i in range(Philosophers): semaphoreList.append(multiprocessing.Semaphore(1)) philosopherList = list() for i in range(Philosophers): #instantiate all processes representing philosophers philosopherList.append(multiprocessing.Process(target=philosopher, args=(i, semaphoreList))) for j in range(Philosophers): #start all child processes philosopherList[j].start() for k in range(Philosophers): #join all child processes philosopherList[k].join() sample output: DEBUG: philosopher2 has chopstick2 DEBUG: philosopher2 has chopstick3 DEBUG: philosopher2 eating DEBUG: philosopher1 has chopstick1 DEBUG: philosopher0…arrow_forwardI'm trying to delete a node after inputting data for 2-3 checks but the node I try to delete remains in the list. How do I fix my deleteCheck() function to run correctly with the rest of my code? Thank you. #include <stdio.h>#include <stdlib.h>// Austin Chong// The core concept of this assignment is to use a linked list in a C program.// 07 March 2020 struct checkNode{int checkNumber;char date[8];char paidTo[100];char description[100];double amount;struct checkNode *head;struct checkNode *next;}; struct checkNode *checkBook = NULL; /* Functions */ void addCheck(){int checkNumber;double amount;char temp;struct checkNode *newCheck = (struct checkNode*) malloc(sizeof(struct checkNode));printf("Please enter the check number: ");scanf("%d", &checkNumber);newCheck -> checkNumber = checkNumber;printf("Please enter the amount: ");scanf("%lf", &amount);newCheck -> amount = amount;printf("Please enter the date: ");scanf("%c", &temp);scanf("%[^\n]", newCheck ->…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON 
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education