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CourseBook Data Structures
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Warmth
  1. Syllabus
  2. Schedule
  3. Instruction
  4. Logistics
  5. Exams
  6. Homework
  7. How to Study
  8. Demos
  10. Read
  11. The Dynamic Array
    1. What is a Data Structure?
    2. The Array Data Structure
    3. Arrays Have a Fixed Size
    4. Dynamic Arrays
    5. What is Abstraction?
    6. Inside the Dynamic Array
    7. Adding Elements
    8. Growing the Array
    9. Why Study Data Structures?
    10. Classes and Objects
    11. Encapsulation and Information Hiding
    12. What is an Algorithm?
    13. Selection Sort
    14. Where Algorithms Live
    15. Selection Sort with Helper Methods
    16. Removing Elements
    17. A Shared indexOf
    18. The Remove Contract
    19. Structures and Algorithms Together
  12. Generics
    1. Why Generics?
    2. Why Not Just Store Object?
    3. A Generic DynamicArray
    4. The Array Problem
    5. Using It
    6. The Trouble with Primitives
    7. Comparing Elements: equals vs ==
    8. Defining Equality for Student
    9. Ordering Elements: Comparable
    10. Making Student Comparable
    11. A Generic ArrayUtils
    12. Sorting, Generically
    13. Custom Orderings: Comparator
    14. Sorting with a Comparator
    15. Overloading remove: by Index or by Value
    16. The DynamicArray<Integer> Trap
  14. Review
  15. The Dynamic Array
    1. Data Structures and Arrays
    2. Abstraction
    3. Dynamic Array Operations
    4. Search and Removal
    5. Dynamic Array Trace
    6. Algorithms and Selection Sort
  16. Generics
    1. Why Generics, and How to Declare One
    2. Defining Equality
    3. Natural Ordering with Comparable
    4. Generic Sorting with Bounded Type Parameters
    5. External Ordering with Comparator
    6. Overloading remove and the Integer Trap
  18. Practice
  19. The Dynamic Array
    1. Problem: Build a Bag
    2. Solution: Fields and Constructor
    3. Solution: Adding a Ball
    4. Solution: Growing the Bag
    5. Solution: Drawing a Ball at Random
  20. Generics
    1. Problem: Make a Card Orderable
    2. Solution: Value Equality
    3. Solution: A Natural Order
    4. Solution: A Second Order
    5. Problem: A Generic max
    6. Solution: Max by Natural Order
    7. Solution: Max by a Comparator

Practice Overview

Work through the two problems below, in order.

You can download the accompanying code for these practice problems: starter and solution.

  1. Problem: Make a Card Orderable
  2. Solution: Value Equality
  3. Solution: A Natural Order
  4. Solution: A Second Order
  5. Problem: A Generic max
  6. Solution: Max by Natural Order
  7. Solution: Max by a Comparator
PreviousSolution: Drawing a Ball at Random NextProblem: Make a Card Orderable