# HI 2: 2-AP-19

## CodeHS Lessons

Document programs in order to make them easier to follow, test, and debug.

 Standard 3.2 Variables 3.3 User Input 3.4 Basic Math 3.6 Random Numbers 6.1 Booleans 6.2 If/Else Statements 6.3 Logical Operators 6.4 Comparison Operators 6.6 While Loops 6.7 The Break Statement 6.9 For Loops 9.1 Functions Challenges 10.1 Timers 10.2 Stopping Timers 10.3 Collisions 10.4 Mouse Click Events 10.5 More Mouse Events 10.6 Key Events 12.1 Breakout 20.3 Iterating Through an Array 20.2 Adding & Removing from an Array 20.1 Intro to Arrays 19.4 Crazy Ball Game 19.3 Animation Practice 21.1 Intro to Objects 21.4 Iterating Through an Object 27.1 Game Design: Helicopter 26.1 Tic Tac Toe 22.4 Grid Example: Get a Row 22.3 Looping Over a Grid 22.2 Intro to Grids 22.1 Intro to Sets 24.1 Visualizing Music 25.2 Connect Four 25.1 Conway's Game of Life 19.2 Fun Graphics Challenges 19.1 Snake Game 18.1 Prime Numbers 17.1 Functions and Parameters Practice 16.4 Extra Karel Puzzles 16.3 Extra Karel Practice
 Standard 9.13 Loop and a Half 9.8 If Statements 9.22 Array Length and Looping Through Arrays 9.22 Array Length and Looping Through Arrays 9.11 Random Numbers 9.11 Random Numbers 9.12 While Loops 9.12 While Loops 9.13 Loop and a Half 9.8 If Statements 9.14 Functions and Parameters 1 9.14 Functions and Parameters 1 9.9 For Loops in JavaScript 9.9 For Loops in JavaScript 9.15 Functions and Parameters 2 9.15 Functions and Parameters 2 9.10 For Loop Practice 9.10 For Loop Practice 9.4 Basic Math in JavaScript 9.2 Variables 9.19 Intro to Lists/Arrays 9.19 Intro to Lists/Arrays 9.20 Indexing Into an Array 9.20 Indexing Into an Array 9.3 User Input 9.3 User Input 9.4 Basic Math in JavaScript 9.2 Variables 9.21 Adding/Removing From an Array 9.21 Adding/Removing From an Array 9.5 Booleans 9.5 Booleans 9.6 Logical Operators 9.6 Logical Operators 9.7 Comparison Operators 9.7 Comparison Operators
 Standard 13.6 Organizational Techniques
 Standard 1.5 Hash Function Development 1.5 Hash Function Development
 Standard 2.2 Variables 2.3 User Input 2.4 Basic Math 2.6 Random Numbers 5.1 Booleans 5.2 If/Else Statements 5.3 Logical Operators 5.4 Comparison Operators 5.6 While Loops 5.7 The Break Statement 5.9 For Loops 8.1 Functions Challenges 9.1 Timers 9.2 Stopping Timers 9.3 Collisions 9.4 Mouse Click Events 9.5 More Mouse Events 9.6 Key Events 11.1 Breakout 12.1 Snake Game 13.1 Intro to Arrays 13.2 Adding & Removing from an Array 13.3 Iterating Through an Array 14.1 Intro to Objects 14.4 Iterating Through an Object 15.1 Tic Tac Toe 16.1 Game Design: Helicopter 22.3 Looping Over a Grid 22.4 Grid Example: Get a Row 22.2 Intro to Grids 25.1 Prime Numbers 24.1 Functions and Parameters Practice 23.4 Extra Karel Puzzles 23.3 Extra Karel Practice 26.2 Animation Practice 26.3 Crazy Ball Game 22.1 Intro to Sets 29.1 Visualizing Music 20.1 Connect Four 27.1 Conway's Game of Life 26.1 Fun Graphics Challenges
 Standard 3.2 Variables 3.3 User Input 3.4 Basic Math 3.6 Random Numbers 6.1 Booleans 6.2 If/Else Statements 6.3 Logical Operators 6.4 Comparison Operators 6.6 While Loops 6.7 The Break Statement 6.9 For Loops 9.1 Functions Challenges 10.1 Timers 10.2 Stopping Timers 10.3 Collisions 10.4 Mouse Click Events 10.5 More Mouse Events 10.6 Key Events 12.1 Breakout 13.1 Intro to Arrays 13.2 Adding & Removing from an Array 13.3 Iterating Through an Array 14.1 Intro to Objects 14.4 Iterating Through an Object 15.1 Tic Tac Toe 16.1 Game Design: Helicopter 27.1 Conway's Game of Life 21.3 Extra Karel Practice 21.4 Extra Karel Puzzles 22.1 Functions and Parameters Practice 23.1 Prime Numbers 24.1 Snake Game 24.4 Crazy Ball Game 24.3 Animation Practice 24.2 Fun Graphics Challenges 26.1 Visualizing Music 27.2 Connect Four 20.4 Grid Example: Get a Row 20.3 Looping Over a Grid 20.2 Intro to Grids 20.1 Intro to Sets
 Standard 3.2 Variables 3.3 User Input 3.4 Basic Math 3.6 Random Numbers 6.1 Booleans 6.2 If/Else Statements 6.3 Logical Operators 6.4 Comparison Operators 6.6 While Loops 6.7 The Break Statement 6.9 For Loops 9.1 Functions Challenges 22.1 Intro to Sets 21.4 Iterating Through an Object 22.2 Intro to Grids 22.3 Looping Over a Grid 22.4 Grid Example: Get a Row 24.1 Tic Tac Toe 25.1 Game Design: Helicopter 17.3 Animation Practice 17.4 Crazy Ball Game 20.1 Intro to Arrays 20.2 Adding & Removing from an Array 20.3 Iterating Through an Array 21.1 Intro to Objects 18.1 Visualizing Music 23.2 Connect Four 23.1 Conway's Game of Life 17.2 Fun Graphics Challenges 17.1 Snake Game 16.1 Prime Numbers 15.1 Functions and Parameters Practice 14.4 Extra Karel Puzzles 14.3 Extra Karel Practice 13.1 Breakout 11.6 Key Events 11.5 More Mouse Events 11.4 Mouse Click Events 11.3 Collisions 11.2 Stopping Timers 11.1 Timers
 Standard 4.3 Booleans 4.4 If/Else Statements
 Standard 10.1 Extra Karel Practice 10.2 Extra Karel Puzzles 12.6 Random Numbers 12.2 Variables 12.3 User Input 12.4 Basic Math
 Standard 2.16 Karel Challenges 2.16 Karel Challenges 3.6 Comments 4.1 Extra Karel Practice 5.1 Extra Karel Puzzles 4.1 Extra Karel Practice 5.1 Extra Karel Puzzles
 Standard 2.16 Karel Challenges 2.16 Karel Challenges 3.2 Variables 3.2 Variables 3.3 User Input 3.3 User Input 3.4 Basic Math in JavaScript 3.4 Basic Math in JavaScript 3.5 Using Graphics in JavaScript 3.5 Using Graphics in JavaScript 4.1 Extra Karel Practice 5.1 Extra Karel Puzzles 4.1 Extra Karel Practice 5.1 Extra Karel Puzzles 6.6 Comments
 Standard 1.16 Karel Challenges 1.16 Karel Challenges 11.1 Extra Karel Practice 12.1 Extra Karel Puzzles 11.1 Extra Karel Practice 12.1 Extra Karel Puzzles 13.6 Comments
 Standard 1.16 Karel Challenges 1.16 Karel Challenges
 Standard 3.2 Variables 3.2 Variables 3.3 User Input 3.3 User Input 3.4 Basic Math in JavaScript 3.4 Basic Math in JavaScript 3.5 Using Graphics in JavaScript 3.5 Using Graphics in JavaScript 5.3 Comments & Pseudocode 6.1 Booleans 6.1 Booleans 6.2 Logical Operators 6.2 Logical Operators 6.3 Comparison Operators 6.3 Comparison Operators 6.4 If Statements 6.4 If Statements 6.5 For Loops in JavaScript 6.5 For Loops in JavaScript 6.6 General For Loops 6.6 General For Loops 6.7 For Loop Practice 6.7 For Loop Practice 6.8 Random Numbers 6.8 Random Numbers 6.9 While Loops 6.9 While Loops 6.10 Loop and a Half 6.10 Loop and a Half 8.1 Functions and Parameters 1 8.1 Functions and Parameters 1 8.2 Functions and Parameters 2 8.2 Functions and Parameters 2 8.3 Functions and Parameters 3 8.3 Functions and Parameters 3 9.1 Functions Challenges 9.1 Functions Challenges 11.1 Timers 11.1 Timers 11.2 Random Circles 11.2 Random Circles 11.3 Random Ghosts 11.3 Random Ghosts 11.4 Bouncing Ball 11.4 Bouncing Ball 11.5 Mouse Events: Mouse Clicked 11.5 Mouse Events: Mouse Clicked 11.6 Mouse Events: Mouse Moved 11.6 Mouse Events: Mouse Moved 11.7 Drawing Lines 11.7 Drawing Lines 11.8 Key Events 11.8 Key Events 11.9 Crazy Ball Game 11.9 Crazy Ball Game 13.1 Breakout 13.1 Breakout 22.1 Game Design: Helicopter 20.1 Functions and Parameters Practice 21.1 Tic Tac Toe 19.1 Extra Karel Puzzles 22.1 Game Design: Helicopter 18.1 Extra Karel Practice 19.1 Extra Karel Puzzles 21.1 Tic Tac Toe 20.1 Functions and Parameters Practice 18.1 Extra Karel Practice
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.4 When Do I Use an Object? 16.1 Indexing Into an Array 17.1 Intro to Objects/Maps 16.3 Removing an Element From an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps 17.2 Basics of Objects 17.3 Iterating Over an Object 17.2 Basics of Objects 17.5 Intro to Sets 17.6 Intro to Grids 17.7 Looping Over a Grid 17.8 Grid Example: Get a Row 17.9 Data Structures Challenges 12.1 Extra Karel Practice 13.1 Extra Karel Puzzles 14.1 Functions and Parameters Practice 17.7 Looping Over a Grid 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game 16.1 Indexing Into an Array 14.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 17.9 Data Structures Challenges 17.8 Grid Example: Get a Row 15.1 Mouse Events: Mouse Moved 17.6 Intro to Grids 17.5 Intro to Sets 17.4 When Do I Use an Object? 17.3 Iterating Over an Object 15.1 Mouse Events: Mouse Moved 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game
 Standard 1.6 Comments 3.3 Comments & Pseudocode 11.16 Karel Challenges 12.1 Extra Karel Puzzles 11.16 Karel Challenges 12.1 Extra Karel Puzzles
 Standard 3.2 Variables 3.2 Variables 3.3 User Input 3.3 User Input 3.4 Basic Math in JavaScript 3.4 Basic Math in JavaScript 3.5 Using Graphics in JavaScript 3.5 Using Graphics in JavaScript 5.1 Booleans 5.1 Booleans 5.2 Logical Operators 5.2 Logical Operators 5.3 Comparison Operators 5.3 Comparison Operators 5.4 If Statements 5.4 If Statements 5.5 For Loops in JavaScript 5.5 For Loops in JavaScript 5.6 General For Loops 5.6 General For Loops 5.7 For Loop Practice 5.7 For Loop Practice 5.8 Random Numbers 5.8 Random Numbers 5.9 While Loops 5.9 While Loops 5.10 Loop and a Half 5.10 Loop and a Half 7.1 Functions and Parameters 1 7.1 Functions and Parameters 1 7.2 Functions and Parameters 2 7.2 Functions and Parameters 2 7.3 Functions and Parameters 3 7.3 Functions and Parameters 3 8.1 Functions Challenges 8.1 Functions Challenges 9.1 Timers 9.1 Timers 9.2 Random Circles 9.2 Random Circles 9.3 Random Ghosts 9.3 Random Ghosts 9.4 Bouncing Ball 9.4 Bouncing Ball 9.5 Mouse Events: Mouse Clicked 9.5 Mouse Events: Mouse Clicked 9.6 Mouse Events: Mouse Moved 9.6 Mouse Events: Mouse Moved 9.7 Drawing Lines 9.7 Drawing Lines 9.8 Key Events 9.8 Key Events 9.9 Crazy Ball Game 9.9 Crazy Ball Game 11.1 Breakout 11.1 Breakout 25.1 Intro to Lists/Arrays 25.2 Indexing Into an Array 25.3 Adding/Removing From an Array 25.4 Array Length and Looping Through Arrays 25.5 Iterating Over an Array 25.6 Finding an Element in a List 25.7 Removing an Element From an Array 25.8 Intro to Objects/Maps 25.9 Basics of Objects 25.10 Iterating Over an Object 25.11 When Do I Use an Object? 25.12 Intro to Sets 25.13 Intro to Grids 25.14 Looping Over a Grid 25.15 Grid Example: Get a Row 25.16 Data Structures Challenges 27.1 Game Design: Helicopter 15.1 Extra Karel Practice 16.1 Extra Karel Puzzles 26.1 Tic Tac Toe 24.1 Visualizing Music 21.1 Evolution Simulation 20.1 Conway's Game of Life 20.2 Connect Four 19.1 Fun Snake 19.2 Fun Graphics Challenges 18.1 Prime Numbers 17.1 Functions and Parameters Practice 25.1 Intro to Lists/Arrays 25.2 Indexing Into an Array 25.3 Adding/Removing From an Array 25.4 Array Length and Looping Through Arrays 25.5 Iterating Over an Array 25.6 Finding an Element in a List 25.7 Removing an Element From an Array 25.8 Intro to Objects/Maps 25.9 Basics of Objects 25.10 Iterating Over an Object 25.11 When Do I Use an Object? 25.12 Intro to Sets 25.13 Intro to Grids 25.14 Looping Over a Grid 25.15 Grid Example: Get a Row 25.16 Data Structures Challenges 27.1 Game Design: Helicopter 15.1 Extra Karel Practice 16.1 Extra Karel Puzzles 26.1 Tic Tac Toe 24.1 Visualizing Music 21.1 Evolution Simulation 20.1 Conway's Game of Life 20.2 Connect Four 19.1 Fun Snake 19.2 Fun Graphics Challenges 18.1 Prime Numbers 17.1 Functions and Parameters Practice
 Standard 3.2 Variables 3.2 Variables 3.3 User Input 3.3 User Input 3.4 Basic Math in JavaScript 3.4 Basic Math in JavaScript 3.5 Using Graphics in JavaScript 3.5 Using Graphics in JavaScript 5.1 Booleans 5.1 Booleans 5.2 Logical Operators 5.2 Logical Operators 5.3 Comparison Operators 5.3 Comparison Operators 5.4 If Statements 5.4 If Statements 5.5 For Loops in JavaScript 5.5 For Loops in JavaScript 5.6 General For Loops 5.6 General For Loops 5.7 For Loop Practice 5.7 For Loop Practice 5.8 Random Numbers 5.8 Random Numbers 5.9 While Loops 5.9 While Loops 5.10 Loop and a Half 5.10 Loop and a Half 7.1 Functions and Parameters 1 7.1 Functions and Parameters 1 7.2 Functions and Parameters 2 7.2 Functions and Parameters 2 7.3 Functions and Parameters 3 7.3 Functions and Parameters 3 8.1 Functions Challenges 8.1 Functions Challenges 9.1 Timers 9.1 Timers 9.2 Random Circles 9.2 Random Circles 9.3 Random Ghosts 9.3 Random Ghosts 9.4 Bouncing Ball 9.4 Bouncing Ball 9.5 Mouse Events: Mouse Clicked 9.5 Mouse Events: Mouse Clicked 9.6 Mouse Events: Mouse Moved 9.6 Mouse Events: Mouse Moved 9.7 Drawing Lines 9.7 Drawing Lines 9.8 Key Events 9.8 Key Events 9.9 Crazy Ball Game 9.9 Crazy Ball Game 11.1 Breakout 11.1 Breakout 12.1 Intro to Lists/Arrays 12.1 Intro to Lists/Arrays 12.2 Indexing Into an Array 12.2 Indexing Into an Array 12.3 Adding/Removing From an Array 12.3 Adding/Removing From an Array 12.4 Array Length and Looping Through Arrays 12.4 Array Length and Looping Through Arrays 12.5 Iterating Over an Array 12.5 Iterating Over an Array 12.6 Finding an Element in a List 12.6 Finding an Element in a List 12.7 Removing an Element From an Array 12.7 Removing an Element From an Array 12.8 Intro to Objects/Maps 12.8 Intro to Objects/Maps 12.9 Basics of Objects 12.9 Basics of Objects 12.10 Iterating Over an Object 12.10 Iterating Over an Object 12.11 When Do I Use an Object? 12.11 When Do I Use an Object? 12.12 Intro to Sets 12.12 Intro to Sets 12.13 Intro to Grids 12.13 Intro to Grids 12.14 Looping Over a Grid 12.14 Looping Over a Grid 12.15 Grid Example: Get a Row 12.15 Grid Example: Get a Row 12.16 Data Structures Challenges 12.16 Data Structures Challenges 13.1 Tic Tac Toe 13.1 Tic Tac Toe 14.1 Game Design: Helicopter 14.1 Game Design: Helicopter 18.1 Extra Karel Practice 19.1 Extra Karel Puzzles 28.1 Visualizing Music 24.1 Evolution Simulation 23.1 Conway's Game of Life 23.2 Connect Four 22.1 Fun Snake 22.2 Fun Graphics Challenges 21.1 Prime Numbers 20.1 Functions and Parameters Practice 18.1 Extra Karel Practice 19.1 Extra Karel Puzzles 28.1 Visualizing Music 24.1 Evolution Simulation 23.1 Conway's Game of Life 23.2 Connect Four 22.1 Fun Snake 22.2 Fun Graphics Challenges 21.1 Prime Numbers 20.1 Functions and Parameters Practice
 Standard 3.2 Variables 3.2 Variables 3.3 User Input 3.3 User Input 3.4 Basic Math in JavaScript 3.4 Basic Math in JavaScript 3.5 Using Graphics in JavaScript 3.5 Using Graphics in JavaScript 5.1 Booleans 5.1 Booleans 5.2 Logical Operators 5.2 Logical Operators 5.3 Comparison Operators 5.3 Comparison Operators 5.4 If Statements 5.4 If Statements 5.5 For Loops in JavaScript 5.5 For Loops in JavaScript 5.6 General For Loops 5.6 General For Loops 5.7 For Loop Practice 5.7 For Loop Practice 5.8 Random Numbers 5.8 Random Numbers 5.9 While Loops 5.9 While Loops 5.10 Loop and a Half 5.10 Loop and a Half 7.1 Functions and Parameters 1 7.1 Functions and Parameters 1 7.2 Functions and Parameters 2 7.2 Functions and Parameters 2 7.3 Functions and Parameters 3 7.3 Functions and Parameters 3 9.1 Functions Challenges 9.1 Functions Challenges 9.1 Functions Challenges 9.1 Functions Challenges 21.10 Iterating Over an Object 21.2 Indexing Into an Array 21.3 Adding/Removing From an Array 21.4 Array Length and Looping Through Arrays 21.5 Iterating Over an Array 21.6 Finding an Element in a List 21.7 Removing an Element From an Array 21.8 Intro to Objects/Maps 21.9 Basics of Objects 11.1 Extra Karel Puzzles 21.10 Iterating Over an Object 13.1 Prime Numbers 14.2 Fun Graphics Challenges 14.1 Fun Snake 15.2 Connect Four 15.1 Conway's Game of Life 16.1 Evolution Simulation 20.1 Visualizing Music 22.1 Tic Tac Toe 12.1 Functions and Parameters Practice 10.1 Extra Karel Practice 23.1 Game Design: Helicopter 21.16 Data Structures Challenges 21.15 Grid Example: Get a Row 21.14 Looping Over a Grid 21.13 Intro to Grids 21.12 Intro to Sets 21.11 When Do I Use an Object? 15.2 Connect Four 21.11 When Do I Use an Object? 21.12 Intro to Sets 21.13 Intro to Grids 21.14 Looping Over a Grid 21.15 Grid Example: Get a Row 21.16 Data Structures Challenges 23.1 Game Design: Helicopter 10.1 Extra Karel Practice 11.1 Extra Karel Puzzles 22.1 Tic Tac Toe 20.1 Visualizing Music 16.1 Evolution Simulation 15.1 Conway's Game of Life 21.1 Intro to Lists/Arrays 14.1 Fun Snake 14.2 Fun Graphics Challenges 13.1 Prime Numbers 12.1 Functions and Parameters Practice 21.9 Basics of Objects 21.8 Intro to Objects/Maps 21.7 Removing an Element From an Array 21.6 Finding an Element in a List 21.5 Iterating Over an Array 21.4 Array Length and Looping Through Arrays 21.3 Adding/Removing From an Array 21.2 Indexing Into an Array 21.1 Intro to Lists/Arrays
 Standard 6.2 Variables 6.3 User Input 6.4 Basic Math in JavaScript 6.5 Booleans 6.6 Logical Operators 6.7 Comparison Operators 6.8 If Statements 6.9 For Loops in JavaScript 6.10 Functions and Parameters 1 6.11 Functions and Parameters 2 6.13 Intro to Lists/Arrays 6.14 Indexing Into an Array 6.15 Adding/Removing From an Array 6.16 Array Length and Looping Through Arrays
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.8 Random Numbers 7.8 Random Numbers 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.3 Iterating Over an Object 16.3 Removing an Element From an Array 16.1 Indexing Into an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps 17.2 Basics of Objects 15.4 Crazy Ball Game 17.4 When Do I Use an Object? 17.5 Intro to Sets 17.6 Intro to Grids 17.7 Looping Over a Grid 17.8 Grid Example: Get a Row 17.9 Data Structures Challenges 12.1 Extra Karel Practice 13.1 Extra Karel Puzzles 14.1 Functions and Parameters Practice 17.7 Looping Over a Grid 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game 16.1 Indexing Into an Array 14.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 17.9 Data Structures Challenges 17.8 Grid Example: Get a Row 15.1 Mouse Events: Mouse Moved 17.6 Intro to Grids 17.5 Intro to Sets 17.4 When Do I Use an Object? 17.3 Iterating Over an Object 17.2 Basics of Objects 17.1 Intro to Objects/Maps 15.1 Mouse Events: Mouse Moved 15.2 Drawing Lines 15.3 Key Events
 Standard 6.3 Variables 6.3 Variables 6.4 User Input 6.4 User Input 6.5 Basic Math in JavaScript 6.5 Basic Math in JavaScript 6.6 Using Graphics in JavaScript 6.6 Using Graphics in JavaScript 8.1 Booleans 8.1 Booleans 8.2 Logical Operators 8.2 Logical Operators 8.3 Comparison Operators 8.3 Comparison Operators 8.4 If Statements 8.4 If Statements 8.5 For Loops in JavaScript 8.5 For Loops in JavaScript 8.6 General For Loops 8.6 General For Loops 8.7 For Loop Practice 8.7 For Loop Practice 8.8 Random Numbers 8.8 Random Numbers 8.9 While Loops 8.9 While Loops 8.10 Loop and a Half 8.10 Loop and a Half 10.1 Functions and Parameters 1 10.1 Functions and Parameters 1 10.2 Functions and Parameters 2 10.2 Functions and Parameters 2 10.3 Functions and Parameters 3 10.3 Functions and Parameters 3 10.7 Timers 10.7 Timers 10.8 Random Circles 10.8 Random Circles 10.9 Random Ghosts 10.9 Random Ghosts 10.10 Bouncing Ball 10.10 Bouncing Ball 10.11 Mouse Events: Mouse Clicked 10.11 Mouse Events: Mouse Clicked 10.12 Intro to Lists/Arrays 10.12 Intro to Lists/Arrays 10.13 Adding/Removing From an Array 10.13 Adding/Removing From an Array 10.14 Array Length and Looping Through Arrays 10.14 Array Length and Looping Through Arrays 10.15 Iterating Over an Array 10.15 Iterating Over an Array 14.3 Iterating Over an Object 13.3 Removing an Element From an Array 13.1 Indexing Into an Array 13.2 Finding an Element in a List 13.2 Finding an Element in a List 13.3 Removing an Element From an Array 14.1 Intro to Objects/Maps 14.2 Basics of Objects 18.4 Crazy Ball Game 14.4 When Do I Use an Object? 14.5 Intro to Sets 14.6 Intro to Grids 14.7 Looping Over a Grid 14.8 Grid Example: Get a Row 14.9 Data Structures Challenges 15.1 Extra Karel Practice 16.1 Extra Karel Puzzles 17.1 Functions and Parameters Practice 14.7 Looping Over a Grid 18.2 Drawing Lines 18.3 Key Events 18.4 Crazy Ball Game 13.1 Indexing Into an Array 17.1 Functions and Parameters Practice 16.1 Extra Karel Puzzles 15.1 Extra Karel Practice 14.9 Data Structures Challenges 14.8 Grid Example: Get a Row 18.1 Mouse Events: Mouse Moved 14.6 Intro to Grids 14.5 Intro to Sets 14.4 When Do I Use an Object? 14.3 Iterating Over an Object 14.2 Basics of Objects 14.1 Intro to Objects/Maps 18.1 Mouse Events: Mouse Moved 18.2 Drawing Lines 18.3 Key Events
 Standard 6.2 Variables 6.2 Variables 6.3 User Input 6.3 User Input 6.4 Basic Math in JavaScript 6.4 Basic Math in JavaScript 6.5 Using Graphics in JavaScript 6.5 Using Graphics in JavaScript 8.1 Booleans 8.1 Booleans 8.2 Logical Operators 8.2 Logical Operators 8.3 Comparison Operators 8.3 Comparison Operators 8.4 If Statements 8.4 If Statements 8.5 For Loops in JavaScript 8.5 For Loops in JavaScript 8.6 General For Loops 8.6 General For Loops 8.7 For Loop Practice 8.7 For Loop Practice 8.8 Random Numbers 8.8 Random Numbers 8.9 While Loops 8.9 While Loops 8.10 Loop and a Half 8.10 Loop and a Half 10.1 Functions and Parameters 1 10.1 Functions and Parameters 1 10.2 Functions and Parameters 2 10.2 Functions and Parameters 2 10.3 Functions and Parameters 3 10.3 Functions and Parameters 3 10.6 Timers 10.6 Timers 10.7 Random Circles 10.7 Random Circles 10.8 Random Ghosts 10.8 Random Ghosts 10.9 Bouncing Ball 10.9 Bouncing Ball 10.10 Mouse Events: Mouse Clicked 10.10 Mouse Events: Mouse Clicked 10.11 Intro to Lists/Arrays 10.11 Intro to Lists/Arrays 10.12 Adding/Removing From an Array 10.12 Adding/Removing From an Array 10.13 Array Length and Looping Through Arrays 10.13 Array Length and Looping Through Arrays 10.14 Iterating Over an Array 10.14 Iterating Over an Array 18.3 Iterating Over an Object 17.3 Removing an Element From an Array 17.1 Indexing Into an Array 17.2 Finding an Element in a List 17.2 Finding an Element in a List 17.3 Removing an Element From an Array 18.1 Intro to Objects/Maps 18.2 Basics of Objects 16.4 Crazy Ball Game 18.4 When Do I Use an Object? 18.5 Intro to Sets 18.6 Intro to Grids 18.7 Looping Over a Grid 18.8 Grid Example: Get a Row 18.9 Data Structures Challenges 13.1 Extra Karel Practice 14.1 Extra Karel Puzzles 15.1 Functions and Parameters Practice 18.7 Looping Over a Grid 16.2 Drawing Lines 16.3 Key Events 16.4 Crazy Ball Game 17.1 Indexing Into an Array 15.1 Functions and Parameters Practice 14.1 Extra Karel Puzzles 13.1 Extra Karel Practice 18.9 Data Structures Challenges 18.8 Grid Example: Get a Row 16.1 Mouse Events: Mouse Moved 18.6 Intro to Grids 18.5 Intro to Sets 18.4 When Do I Use an Object? 18.3 Iterating Over an Object 18.2 Basics of Objects 18.1 Intro to Objects/Maps 16.1 Mouse Events: Mouse Moved 16.2 Drawing Lines 16.3 Key Events
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.4 When Do I Use an Object? 16.1 Indexing Into an Array 17.1 Intro to Objects/Maps 16.3 Removing an Element From an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps 17.2 Basics of Objects 17.3 Iterating Over an Object 17.2 Basics of Objects 17.5 Intro to Sets 17.6 Intro to Grids 17.7 Looping Over a Grid 17.8 Grid Example: Get a Row 17.9 Data Structures Challenges 12.1 Extra Karel Practice 13.1 Extra Karel Puzzles 14.1 Functions and Parameters Practice 17.7 Looping Over a Grid 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game 16.1 Indexing Into an Array 14.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 17.9 Data Structures Challenges 17.8 Grid Example: Get a Row 15.1 Mouse Events: Mouse Moved 17.6 Intro to Grids 17.5 Intro to Sets 17.4 When Do I Use an Object? 17.3 Iterating Over an Object 15.1 Mouse Events: Mouse Moved 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game
 Standard 1.6 Comments 3.3 Comments & Pseudocode 11.16 Karel Challenges 12.1 Extra Karel Puzzles 11.16 Karel Challenges 12.1 Extra Karel Puzzles
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.4 When Do I Use an Object? 16.1 Indexing Into an Array 17.1 Intro to Objects/Maps 16.3 Removing an Element From an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps 17.2 Basics of Objects 17.3 Iterating Over an Object 17.2 Basics of Objects 17.5 Intro to Sets 17.6 Intro to Grids 17.7 Looping Over a Grid 17.8 Grid Example: Get a Row 17.9 Data Structures Challenges 12.1 Extra Karel Practice 13.1 Extra Karel Puzzles 14.1 Functions and Parameters Practice 17.7 Looping Over a Grid 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game 16.1 Indexing Into an Array 14.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 17.9 Data Structures Challenges 17.8 Grid Example: Get a Row 15.1 Mouse Events: Mouse Moved 17.6 Intro to Grids 17.5 Intro to Sets 17.4 When Do I Use an Object? 17.3 Iterating Over an Object 15.1 Mouse Events: Mouse Moved 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game
 Standard 1.6 Comments 3.3 Comments & Pseudocode 11.16 Karel Challenges 12.1 Extra Karel Puzzles 11.16 Karel Challenges 12.1 Extra Karel Puzzles
 Standard 6.2 Variables 6.2 Variables 6.3 User Input 6.3 User Input 6.4 Basic Math in JavaScript 6.4 Basic Math in JavaScript 6.5 Using Graphics in JavaScript 6.5 Using Graphics in JavaScript 9.1 Booleans 9.1 Booleans 9.2 Logical Operators 9.2 Logical Operators 9.3 Comparison Operators 9.3 Comparison Operators 9.4 If Statements 9.4 If Statements 9.5 For Loops in JavaScript 9.5 For Loops in JavaScript 9.6 General For Loops 9.6 General For Loops 9.7 For Loop Practice 9.7 For Loop Practice 9.8 Random Numbers 9.8 Random Numbers 9.9 While Loops 9.9 While Loops 9.10 Loop and a Half 9.10 Loop and a Half 11.1 Functions and Parameters 1 11.1 Functions and Parameters 1 11.2 Functions and Parameters 2 11.2 Functions and Parameters 2 11.3 Functions and Parameters 3 11.3 Functions and Parameters 3 11.6 Timers 11.6 Timers 11.7 Random Circles 11.7 Random Circles 11.8 Random Ghosts 11.8 Random Ghosts 11.9 Bouncing Ball 11.9 Bouncing Ball 11.10 Mouse Events: Mouse Clicked 11.10 Mouse Events: Mouse Clicked 11.11 Intro to Lists/Arrays 11.11 Intro to Lists/Arrays 11.12 Adding/Removing From an Array 11.12 Adding/Removing From an Array 11.13 Array Length and Looping Through Arrays 11.13 Array Length and Looping Through Arrays 11.14 Iterating Over an Array 11.14 Iterating Over an Array 19.3 Iterating Over an Object 18.3 Removing an Element From an Array 18.1 Indexing Into an Array 18.2 Finding an Element in a List 18.2 Finding an Element in a List 18.3 Removing an Element From an Array 19.1 Intro to Objects/Maps 19.2 Basics of Objects 17.4 Crazy Ball Game 19.4 When Do I Use an Object? 19.5 Intro to Sets 19.6 Intro to Grids 19.7 Looping Over a Grid 19.8 Grid Example: Get a Row 19.9 Data Structures Challenges 14.1 Extra Karel Practice 15.1 Extra Karel Puzzles 16.1 Functions and Parameters Practice 19.7 Looping Over a Grid 17.2 Drawing Lines 17.3 Key Events 17.4 Crazy Ball Game 18.1 Indexing Into an Array 16.1 Functions and Parameters Practice 15.1 Extra Karel Puzzles 14.1 Extra Karel Practice 19.9 Data Structures Challenges 19.8 Grid Example: Get a Row 17.1 Mouse Events: Mouse Moved 19.6 Intro to Grids 19.5 Intro to Sets 19.4 When Do I Use an Object? 19.3 Iterating Over an Object 19.2 Basics of Objects 19.1 Intro to Objects/Maps 17.1 Mouse Events: Mouse Moved 17.2 Drawing Lines 17.3 Key Events
 Standard 6.5 Organizational Techniques
 Standard 10.3 Variables 10.4 User Input 10.5 Basic Math 10.6 Random Numbers 14.1 Booleans 14.3 Logical Operators 14.4 Comparison Operators 14.2 If/Else Statements 14.9 For Loops 14.6 While Loops 14.7 The Break Statement 13.1 Extra Karel Practice 13.2 Extra Karel Puzzles
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 16.2 Drawing Lines 16.3 Key Events 16.1 Mouse Events: Mouse Moved 17.10 Mouse Events: Mouse Clicked 17.9 Bouncing Ball 17.8 Random Ghosts 17.7 Random Circles 17.6 Timers 17.3 Functions and Parameters 3 17.2 Functions and Parameters 2 17.1 Functions and Parameters 1 14.10 Loop and a Half 14.9 While Loops 14.8 Random Numbers 14.7 For Loop Practice 14.6 General For Loops 14.5 For Loops in JavaScript 14.4 If Statements 14.3 Comparison Operators 14.2 Logical Operators 20.3 Iterating Over an Object 14.1 Booleans 21.9 Hash Function Development 18.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 20.9 Data Structures Challenges 20.8 Grid Example: Get a Row 20.7 Looping Over a Grid 20.6 Intro to Grids 20.5 Intro to Sets 20.4 When Do I Use an Object? 21.10 Project: Classic Cipher Newscast 20.2 Basics of Objects 20.1 Intro to Objects/Maps 19.3 Removing an Element From an Array 19.2 Finding an Element in a List 17.14 Iterating Over an Array 17.13 Array Length and Looping Through Arrays 17.12 Adding/Removing From an Array 19.1 Indexing Into an Array 17.11 Intro to Lists/Arrays 16.4 Crazy Ball Game 17.2 Functions and Parameters 2 16.4 Crazy Ball Game 16.3 Key Events 16.2 Drawing Lines 16.1 Mouse Events: Mouse Moved 17.10 Mouse Events: Mouse Clicked 17.9 Bouncing Ball 17.8 Random Ghosts 17.7 Random Circles 17.6 Timers 17.3 Functions and Parameters 3 17.11 Intro to Lists/Arrays 17.1 Functions and Parameters 1 14.10 Loop and a Half 14.9 While Loops 14.8 Random Numbers 14.7 For Loop Practice 14.6 General For Loops 14.5 For Loops in JavaScript 14.4 If Statements 14.3 Comparison Operators 14.2 Logical Operators 20.4 When Do I Use an Object? 21.10 Project: Classic Cipher Newscast 21.9 Hash Function Development 18.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 20.9 Data Structures Challenges 20.8 Grid Example: Get a Row 20.7 Looping Over a Grid 20.6 Intro to Grids 20.5 Intro to Sets 14.1 Booleans 20.3 Iterating Over an Object 20.2 Basics of Objects 20.1 Intro to Objects/Maps 19.3 Removing an Element From an Array 19.2 Finding an Element in a List 17.14 Iterating Over an Array 17.13 Array Length and Looping Through Arrays 17.12 Adding/Removing From an Array 19.1 Indexing Into an Array
 Standard 10.3 Variables 10.3 Variables 10.4 User Input 10.4 User Input 10.5 Basic Math in JavaScript 10.5 Basic Math in JavaScript 10.6 Using Graphics in JavaScript 10.6 Using Graphics in JavaScript 14.1 Extra Karel Puzzles 15.1 Booleans 13.1 Extra Karel Practice 15.10 Loop and a Half 15.9 While Loops 15.8 Random Numbers 15.7 For Loop Practice 15.6 General For Loops 15.5 For Loops in JavaScript 15.4 If Statements 15.3 Comparison Operators 15.2 Logical Operators 15.1 Booleans 14.1 Extra Karel Puzzles 13.1 Extra Karel Practice 15.10 Loop and a Half 15.9 While Loops 15.8 Random Numbers 15.7 For Loop Practice 15.6 General For Loops 15.5 For Loops in JavaScript 15.4 If Statements 15.3 Comparison Operators 15.2 Logical Operators
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.4 When Do I Use an Object? 16.1 Indexing Into an Array 17.1 Intro to Objects/Maps 16.3 Removing an Element From an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps 17.2 Basics of Objects 17.3 Iterating Over an Object 17.2 Basics of Objects 17.5 Intro to Sets 17.6 Intro to Grids 17.7 Looping Over a Grid 17.8 Grid Example: Get a Row 17.9 Data Structures Challenges 12.1 Extra Karel Practice 13.1 Extra Karel Puzzles 14.1 Functions and Parameters Practice 17.7 Looping Over a Grid 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game 16.1 Indexing Into an Array 14.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 17.9 Data Structures Challenges 17.8 Grid Example: Get a Row 15.1 Mouse Events: Mouse Moved 17.6 Intro to Grids 17.5 Intro to Sets 17.4 When Do I Use an Object? 17.3 Iterating Over an Object 15.1 Mouse Events: Mouse Moved 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game
 Standard 1.6 Comments 3.3 Comments & Pseudocode 6.16 Karel Challenges 7.1 Extra Karel Puzzles 6.16 Karel Challenges 7.1 Extra Karel Puzzles
 Standard 2.2 Variables 2.3 User Input 2.4 Basic Math 2.6 Random Numbers 4.1 Booleans 4.2 If/Else Statements 4.3 Logical Operators 4.4 Comparison Operators 4.6 While Loops 4.7 The Break Statement 4.9 For Loops 6.1 Timers 6.2 Stopping Timers 6.3 Collisions 6.4 Mouse Click Events 6.5 More Mouse Events 6.6 Key Events 21.4 Crazy Ball Game 29.7 Removing an Element From an Array 29.8 Intro to Objects/Maps 29.9 Basics of Objects 29.10 Iterating Over an Object 29.11 When Do I Use an Object? 29.12 Intro to Sets 29.13 Intro to Grids 29.14 Looping Over a Grid 29.15 Grid Example: Get a Row 29.16 Data Structures Quiz 31.1 Tic Tac Toe 32.1 Game Design: Helicopter 21.3 Animation Practice 30.1 Conway's Game of Life 25.1 Functions Challenges 27.1 Breakout 19.1 Extra Karel Practice 19.2 Extra Karel Puzzles 24.1 Functions and Parameters Practice 20.1 Prime Numbers 21.1 Snake Game 21.2 Fun Graphics Challenges 29.6 Finding an Element in a List 30.2 Connect Four 28.1 Visualizing Music 29.1 Intro to Lists/Arrays 29.2 Indexing Into an Array 29.3 Adding/Removing From an Array 29.4 Array Length and Looping Through Arrays 29.5 Iterating Over an Array
 Standard 8.3 Variables 8.3 Variables 8.4 User Input 8.4 User Input 8.5 Basic Math in JavaScript 8.5 Basic Math in JavaScript 8.6 Using Graphics in JavaScript 8.6 Using Graphics in JavaScript 10.1 Booleans 10.1 Booleans 10.2 Logical Operators 10.2 Logical Operators 10.3 Comparison Operators 10.3 Comparison Operators 10.4 If Statements 10.4 If Statements 10.5 For Loops in JavaScript 10.5 For Loops in JavaScript 10.6 General For Loops 10.6 General For Loops 10.7 For Loop Practice 10.7 For Loop Practice 10.8 Random Numbers 10.8 Random Numbers 10.9 While Loops 10.9 While Loops 10.10 Loop and a Half 10.10 Loop and a Half 12.1 Functions and Parameters 1 12.1 Functions and Parameters 1 12.2 Functions and Parameters 2 12.2 Functions and Parameters 2 12.3 Functions and Parameters 3 12.3 Functions and Parameters 3 13.1 Functions Challenges 13.1 Functions Challenges 21.1 Timers 21.2 Random Circles 21.3 Random Ghosts 21.4 Bouncing Ball 21.5 Mouse Events: Mouse Clicked 21.6 Mouse Events: Mouse Moved 21.7 Drawing Lines 21.8 Key Events 21.9 Crazy Ball Game 23.1 Breakout 33.1 Intro to Lists/Arrays 33.2 Indexing Into an Array 33.3 Adding/Removing From an Array 33.4 Array Length and Looping Through Arrays 33.5 Iterating Over an Array 33.6 Finding an Element in a List 33.7 Removing an Element From an Array 33.8 Intro to Objects/Maps 33.9 Basics of Objects 33.10 Iterating Over an Object 33.11 When Do I Use an Object? 33.12 Intro to Sets 33.13 Intro to Grids 33.14 Looping Over a Grid 33.15 Grid Example: Get a Row 33.16 Data Structures Challenges 35.1 Game Design: Helicopter 20.1 Extra Karel Practice 24.1 Extra Karel Puzzles 34.1 Tic Tac Toe 32.1 Visualizing Music 29.1 Evolution Simulation 28.1 Conway's Game of Life 28.2 Connect Four 27.1 Fun Snake 27.2 Fun Graphics Challenges 26.1 Prime Numbers 25.1 Functions and Parameters Practice 21.1 Timers 21.2 Random Circles 21.3 Random Ghosts 21.4 Bouncing Ball 21.5 Mouse Events: Mouse Clicked 21.6 Mouse Events: Mouse Moved 21.7 Drawing Lines 21.8 Key Events 21.9 Crazy Ball Game 23.1 Breakout 33.1 Intro to Lists/Arrays 33.2 Indexing Into an Array 33.3 Adding/Removing From an Array 33.4 Array Length and Looping Through Arrays 33.5 Iterating Over an Array 33.6 Finding an Element in a List 33.7 Removing an Element From an Array 33.8 Intro to Objects/Maps 33.9 Basics of Objects 33.10 Iterating Over an Object 33.11 When Do I Use an Object? 33.12 Intro to Sets 33.13 Intro to Grids 33.14 Looping Over a Grid 33.15 Grid Example: Get a Row 33.16 Data Structures Challenges 35.1 Game Design: Helicopter 20.1 Extra Karel Practice 24.1 Extra Karel Puzzles 34.1 Tic Tac Toe 32.1 Visualizing Music 29.1 Evolution Simulation 28.1 Conway's Game of Life 28.2 Connect Four 27.1 Fun Snake 27.2 Fun Graphics Challenges 26.1 Prime Numbers 25.1 Functions and Parameters Practice
 Standard 8.3 Variables 8.3 Variables 8.4 User Input 8.4 User Input 8.5 Basic Math in JavaScript 8.5 Basic Math in JavaScript 8.6 Using Graphics in JavaScript 8.6 Using Graphics in JavaScript 10.1 Booleans 10.1 Booleans 10.2 Logical Operators 10.2 Logical Operators 10.3 Comparison Operators 10.3 Comparison Operators 10.4 If Statements 10.4 If Statements 10.5 For Loops in JavaScript 10.5 For Loops in JavaScript 10.6 General For Loops 10.6 General For Loops 10.7 For Loop Practice 10.7 For Loop Practice 10.8 Random Numbers 10.8 Random Numbers 10.9 While Loops 10.9 While Loops 10.10 Loop and a Half 10.10 Loop and a Half 12.1 Functions and Parameters 1 12.1 Functions and Parameters 1 12.2 Functions and Parameters 2 12.2 Functions and Parameters 2 12.3 Functions and Parameters 3 12.3 Functions and Parameters 3 13.1 Functions Challenges 13.1 Functions Challenges 21.1 Timers 21.2 Random Circles 21.3 Random Ghosts 21.4 Bouncing Ball 21.5 Mouse Events: Mouse Clicked 21.6 Mouse Events: Mouse Moved 21.7 Drawing Lines 21.8 Key Events 21.9 Crazy Ball Game 23.1 Breakout 33.1 Intro to Lists/Arrays 33.2 Indexing Into an Array 33.3 Adding/Removing From an Array 33.4 Array Length and Looping Through Arrays 33.5 Iterating Over an Array 33.6 Finding an Element in a List 33.7 Removing an Element From an Array 33.8 Intro to Objects/Maps 33.9 Basics of Objects 33.10 Iterating Over an Object 33.11 When Do I Use an Object? 33.12 Intro to Sets 33.13 Intro to Grids 33.14 Looping Over a Grid 33.15 Grid Example: Get a Row 33.16 Data Structures Challenges 35.1 Game Design: Helicopter 20.1 Extra Karel Practice 24.1 Extra Karel Puzzles 34.1 Tic Tac Toe 32.1 Visualizing Music 29.1 Evolution Simulation 28.1 Conway's Game of Life 28.2 Connect Four 27.1 Fun Snake 27.2 Fun Graphics Challenges 26.1 Prime Numbers 25.1 Functions and Parameters Practice 21.1 Timers 21.2 Random Circles 21.3 Random Ghosts 21.4 Bouncing Ball 21.5 Mouse Events: Mouse Clicked 21.6 Mouse Events: Mouse Moved 21.7 Drawing Lines 21.8 Key Events 21.9 Crazy Ball Game 23.1 Breakout 33.1 Intro to Lists/Arrays 33.2 Indexing Into an Array 33.3 Adding/Removing From an Array 33.4 Array Length and Looping Through Arrays 33.5 Iterating Over an Array 33.6 Finding an Element in a List 33.7 Removing an Element From an Array 33.8 Intro to Objects/Maps 33.9 Basics of Objects 33.10 Iterating Over an Object 33.11 When Do I Use an Object? 33.12 Intro to Sets 33.13 Intro to Grids 33.14 Looping Over a Grid 33.15 Grid Example: Get a Row 33.16 Data Structures Challenges 35.1 Game Design: Helicopter 20.1 Extra Karel Practice 24.1 Extra Karel Puzzles 34.1 Tic Tac Toe 32.1 Visualizing Music 29.1 Evolution Simulation 28.1 Conway's Game of Life 28.2 Connect Four 27.1 Fun Snake 27.2 Fun Graphics Challenges 26.1 Prime Numbers 25.1 Functions and Parameters Practice
 Standard 1.5 Timers 1.6 Stopping Timers 1.7 Collisions 1.8 Mouse Click Events 1.9 More Mouse Events 1.10 Key Events 4.7 Comments
 Standard 4.2 Variables 4.2 Variables 4.3 User Input 4.3 User Input 4.4 Basic Math in JavaScript 4.4 Basic Math in JavaScript 4.5 Using Graphics in JavaScript 4.5 Using Graphics in JavaScript 6.1 Booleans 6.1 Booleans 6.2 Logical Operators 6.2 Logical Operators 6.3 Comparison Operators 6.3 Comparison Operators 6.4 If Statements 6.4 If Statements 6.5 For Loops in JavaScript 6.5 For Loops in JavaScript 6.6 General For Loops 6.6 General For Loops 6.7 For Loop Practice 6.7 For Loop Practice 6.8 Random Numbers 6.8 Random Numbers 6.9 While Loops 6.9 While Loops 6.10 Loop and a Half 6.10 Loop and a Half 8.1 Functions and Parameters 1 8.1 Functions and Parameters 1 8.2 Functions and Parameters 2 8.2 Functions and Parameters 2 8.3 Functions and Parameters 3 8.3 Functions and Parameters 3 9.1 Functions Challenges 9.1 Functions Challenges 10.1 Timers 10.1 Timers 10.2 Random Circles 10.2 Random Circles 10.3 Random Ghosts 10.3 Random Ghosts 10.4 Bouncing Ball 10.4 Bouncing Ball 10.5 Mouse Events: Mouse Clicked 10.5 Mouse Events: Mouse Clicked 10.6 Mouse Events: Mouse Moved 10.6 Mouse Events: Mouse Moved 10.7 Drawing Lines 10.7 Drawing Lines 10.8 Key Events 10.8 Key Events 10.9 Crazy Ball Game 10.9 Crazy Ball Game 12.1 Breakout 12.1 Breakout 26.1 Intro to Lists/Arrays 26.2 Indexing Into an Array 26.3 Adding/Removing From an Array 26.4 Array Length and Looping Through Arrays 26.5 Iterating Over an Array 26.6 Finding an Element in a List 26.7 Removing an Element From an Array 26.8 Intro to Objects/Maps 26.9 Basics of Objects 26.10 Iterating Over an Object 26.11 When Do I Use an Object? 26.12 Intro to Sets 26.13 Intro to Grids 26.14 Looping Over a Grid 26.15 Grid Example: Get a Row 26.16 Data Structures Challenges 28.1 Game Design: Helicopter 16.1 Extra Karel Practice 17.1 Extra Karel Puzzles 27.1 Tic Tac Toe 25.1 Visualizing Music 22.1 Evolution Simulation 21.1 Conway's Game of Life 21.2 Connect Four 20.1 Fun Snake 20.2 Fun Graphics Challenges 19.1 Prime Numbers 18.1 Functions and Parameters Practice 26.1 Intro to Lists/Arrays 26.2 Indexing Into an Array 26.3 Adding/Removing From an Array 26.4 Array Length and Looping Through Arrays 26.5 Iterating Over an Array 26.6 Finding an Element in a List 26.7 Removing an Element From an Array 26.8 Intro to Objects/Maps 26.9 Basics of Objects 26.10 Iterating Over an Object 26.11 When Do I Use an Object? 26.12 Intro to Sets 26.13 Intro to Grids 26.14 Looping Over a Grid 26.15 Grid Example: Get a Row 26.16 Data Structures Challenges 28.1 Game Design: Helicopter 16.1 Extra Karel Practice 17.1 Extra Karel Puzzles 27.1 Tic Tac Toe 25.1 Visualizing Music 22.1 Evolution Simulation 21.1 Conway's Game of Life 21.2 Connect Four 20.1 Fun Snake 20.2 Fun Graphics Challenges 19.1 Prime Numbers 18.1 Functions and Parameters Practice
 Standard 3.1 Project: Classic Cipher Newscast 3.1 Project: Classic Cipher Newscast 4.5 Hash Function Development 4.5 Hash Function Development 23.6 Organizational Techniques
 Standard 1.6 Comments 3.3 Comments & Pseudocode 11.16 Karel Challenges 12.1 Extra Karel Puzzles 11.16 Karel Challenges 12.1 Extra Karel Puzzles
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.4 When Do I Use an Object? 16.1 Indexing Into an Array 17.1 Intro to Objects/Maps 16.3 Removing an Element From an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps 17.2 Basics of Objects 17.3 Iterating Over an Object 17.2 Basics of Objects 17.5 Intro to Sets 17.6 Intro to Grids 17.7 Looping Over a Grid 17.8 Grid Example: Get a Row 17.9 Data Structures Challenges 12.1 Extra Karel Practice 13.1 Extra Karel Puzzles 14.1 Functions and Parameters Practice 17.7 Looping Over a Grid 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game 16.1 Indexing Into an Array 14.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 17.9 Data Structures Challenges 17.8 Grid Example: Get a Row 15.1 Mouse Events: Mouse Moved 17.6 Intro to Grids 17.5 Intro to Sets 17.4 When Do I Use an Object? 17.3 Iterating Over an Object 15.1 Mouse Events: Mouse Moved 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.8 Random Numbers 7.8 Random Numbers 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.3 Iterating Over an Object 16.3 Removing an Element From an Array 16.1 Indexing Into an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps 17.2 Basics of Objects 15.4 Crazy Ball Game 17.4 When Do I Use an Object? 17.5 Intro to Sets 17.6 Intro to Grids 17.7 Looping Over a Grid 17.8 Grid Example: Get a Row 17.9 Data Structures Challenges 12.1 Extra Karel Practice 13.1 Extra Karel Puzzles 14.1 Functions and Parameters Practice 17.7 Looping Over a Grid 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game 16.1 Indexing Into an Array 14.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 17.9 Data Structures Challenges 17.8 Grid Example: Get a Row 15.1 Mouse Events: Mouse Moved 17.6 Intro to Grids 17.5 Intro to Sets 17.4 When Do I Use an Object? 17.3 Iterating Over an Object 17.2 Basics of Objects 17.1 Intro to Objects/Maps 15.1 Mouse Events: Mouse Moved 15.2 Drawing Lines 15.3 Key Events
 Standard 1.6 Comments 3.3 Comments & Pseudocode 11.16 Karel Challenges 12.1 Extra Karel Puzzles 11.16 Karel Challenges 12.1 Extra Karel Puzzles
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.4 When Do I Use an Object? 16.1 Indexing Into an Array 17.1 Intro to Objects/Maps 16.3 Removing an Element From an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps 17.2 Basics of Objects 17.3 Iterating Over an Object 17.2 Basics of Objects 17.5 Intro to Sets 17.6 Intro to Grids 17.7 Looping Over a Grid 17.8 Grid Example: Get a Row 17.9 Data Structures Challenges 12.1 Extra Karel Practice 13.1 Extra Karel Puzzles 14.1 Functions and Parameters Practice 17.7 Looping Over a Grid 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game 16.1 Indexing Into an Array 14.1 Functions and Parameters Practice 13.1 Extra Karel Puzzles 12.1 Extra Karel Practice 17.9 Data Structures Challenges 17.8 Grid Example: Get a Row 15.1 Mouse Events: Mouse Moved 17.6 Intro to Grids 17.5 Intro to Sets 17.4 When Do I Use an Object? 17.3 Iterating Over an Object 15.1 Mouse Events: Mouse Moved 15.2 Drawing Lines 15.3 Key Events 15.4 Crazy Ball Game
 Standard 1.6 Comments 3.3 Comments & Pseudocode 11.16 Karel Challenges 12.1 Extra Karel Puzzles 11.16 Karel Challenges 12.1 Extra Karel Puzzles
 Standard 8.2 Variables 8.3 User Input 8.4 Basic Math 8.5 Random Numbers 8.7 Booleans 8.9 Logical Operators 8.10 Comparison Operators 8.11 While Loops 8.12 For Loops 8.8 If/Else Statements
 Standard 10.7 Booleans 10.9 Logical Operators 10.10 Comparison Operators 10.8 If/Else Statements 10.12 For Loops 10.5 Random Numbers 10.11 While Loops 10.2 Variables 10.3 User Input 10.4 Basic Math
 Standard 5.2 Variables 5.2 Variables 5.3 User Input 5.3 User Input 5.4 Basic Math in JavaScript 5.4 Basic Math in JavaScript 5.5 Using Graphics in JavaScript 5.5 Using Graphics in JavaScript 7.1 Booleans 7.1 Booleans 7.2 Logical Operators 7.2 Logical Operators 7.3 Comparison Operators 7.3 Comparison Operators 7.4 If Statements 7.4 If Statements 7.5 For Loops in JavaScript 7.5 For Loops in JavaScript 7.6 General For Loops 7.6 General For Loops 7.7 For Loop Practice 7.7 For Loop Practice 7.9 While Loops 7.9 While Loops 7.10 Loop and a Half 7.10 Loop and a Half 9.1 Functions and Parameters 1 9.1 Functions and Parameters 1 9.2 Functions and Parameters 2 9.2 Functions and Parameters 2 9.3 Functions and Parameters 3 9.3 Functions and Parameters 3 9.6 Timers 9.6 Timers 9.7 Random Circles 9.7 Random Circles 9.8 Random Ghosts 9.8 Random Ghosts 9.9 Bouncing Ball 9.9 Bouncing Ball 9.10 Mouse Events: Mouse Clicked 9.10 Mouse Events: Mouse Clicked 9.11 Intro to Lists/Arrays 9.11 Intro to Lists/Arrays 9.12 Adding/Removing From an Array 9.12 Adding/Removing From an Array 9.13 Array Length and Looping Through Arrays 9.13 Array Length and Looping Through Arrays 9.14 Iterating Over an Array 9.14 Iterating Over an Array 17.4 When Do I Use an Object? 16.1 Indexing Into an Array 17.1 Intro to Objects/Maps 16.3 Removing an Element From an Array 16.2 Finding an Element in a List 16.2 Finding an Element in a List 16.3 Removing an Element From an Array 17.1 Intro to Objects/Maps