CS 112: Data Structures Sesh Venugopal Heap – Implementation Implementation: Structure for storage of heap items As far as the conceptual structure goes, the heap is a binary tree. Therefore, one would expect that a heap could be implemented using a linked binary tree structure, as we did with BSTs However, the fact that the […]
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 7-2 : Queues Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Queues ADT (ABSTRACT DATA TYPE) List add(i, e), remove(i), get(i), set(i), ….. Stack push(e) , pop(), .. Queue enqueue(e), dequeue() QUEUE dequeue (remove
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 5-1: Arraylist Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? Arraylist ARRAY LISTS ARRAYS IN JAVA Arrays whose elements have a primitive type int[] myInts = new int[15]; myInts[3] = -732; Arrays whose elements have a reference type Shape[] myShapes
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 8-3 : OOD10 Iterable and Iterator Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? Java interfaces Iterable and Iterator ITERABLE and ITERATOR REMEMBER THE FOR-EACH LOOP? int[] numbers = {1,2,3,4,5}; for(int element: numbers) { System.out.println(element); } The for-each loop (also called enhanced
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AVL Tree Juan Zhai juan.zhai@rutgers.edu Insertion • InsertavalueasinaregularBSTbysearchingforits correct position. • Backtrackfromtheinsertednodeupthechainof parents, updating the balance factor of each node along the way. Stop at a node along the way if it is unbalanced and rebalance the node. – Never stop and rebalance if no node along the backtracking path is unbalanced. – Once stop
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 13-2 : Hashing Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Hash Maps RECALL: MAP keys (type K) values (typeV) Each (key, value) pairs is an “entry”. For each key, there is at most one value. ARRAYS OF
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 14-1 : Graphs 2 Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Recursive graph traversal depth first Non-recursive graph traversal depth first breadth first RECALL: TREETRAVERSAL (RECURSIVE) depthFirst_Tree (root){ if (root is not empty){ visit root // preorder
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 7-1 : Stacks Giulia Alberini, Fall 2020 Slides adapted from Michael Langer’s WHAT ARE WE GOING TO DO IN THIS VIDEO? Stacks ABSTRACT DATA TYPE (ADT) An ADT is a model for a data type. It defines a data type by its behavior from the user’s perspective
程序代写代做代考 clock go Java algorithm data structure graph html COMP 250 Read More »
COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 3-4: OOD3 Other methods, mutable vs immutable, final variables Giulia Alberini, Fall 2020 OBJECTS – QUICK REVIEW Book.java public class Book { public String title; public String author; } TestBook.java public class TestBook { public static void main(String[] args) { Book b = new Book(); b.title = “Matilda”;
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COMP 250 INTRODUCTION TO COMPUTER SCIENCE Week 8-1 : OOD8 Interfaces and Generics Giulia Alberini, Fall 2020 WHAT ARE WE GOING TO DO IN THIS VIDEO? Interfaces (disclaimer: we’ll talk about interfaces pre Java 8) Generics INTERFACES interface is a reserved keyword in Java. Like classes, interfaces can be declared to
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