JavaScript Ninja

Challenge: Align two columns

Welcome to the "Align Two Columns" challenge!

Let's recap the ninja methods and features you've learned:

Ninja Methods:

goRight(), goLeft(), goUp(), goDown(): Move the ninja one cell in the specified direction.
pickSushi(): Pick up sushi from the map and add it to your inventory.
putSushi(): Place sushi from your inventory onto a cell.
objectUp(), objectDown(), objectRight(), objectLeft(): Determine the object in the next cell in the specified direction, returning "wall", "sushi", or "empty".

Programming Concepts:

Functions: Create reusable blocks of code to perform specific tasks.
Decomposition: Break down complex problems into smaller, manageable parts.
Loops: Use for and while loops to repeat actions.
Conditional Statements: Use if-else statements to make decisions based on conditions.

Task

Swipe to start coding

Solution

function ninjaController(ninja) {

ninja.goLeft();

const left = caclulateColumnSize(ninja);

ninja.goRight();

ninja.goRight();

const right = caclulateColumnSize(ninja);

if (left > right) {

ninja.goLeft();

ninja.goLeft();

const sushiToMove = (left - right) / 2;

pickNTop(ninja, left, sushiToMove);

ninja.goRight();

ninja.goRight();

putNTop(ninja, right);

} else {

const sushiToMove = (right - left) / 2;

pickNTop(ninja, right, sushiToMove);

ninja.goLeft();

ninja.goLeft();

putNTop(ninja, left);

}

}

function putNTop(ninja, n) {

while (ninja.objectUp() === "sushi") {

ninja.goUp();

}

for (let i = 0; i < n; i++) {

ninja.putSushi();

ninja.goUp();

}

}

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Section 6. Chapter 4

ninja.js

function ninjaController(ninja) {

// Write your code below

}

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JavaScript Ninja

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1. Basic Controls

In the "Basic Controls" section, you'll be introduced to the foundational features of JavaScript through the engaging Ninja Game. You'll learn how to use JavaScript commands to control your ninja's movements and interactions on the grid, mastering essential functions like moving, picking up, and placing sushi. Through hands-on practice, you'll apply these skills to solve fun challenges, reinforcing your understanding of JavaScript's basic capabilities.

Practice. Collect Side Sushi

Practice. Collect Diagonal Sushi

Practice. Bypass an Obstacle

2. Advanced Controls

Movement Challenge

Practice. Pick and Move to the Corner

Practice. Move Sushi to the Center of the Box

Practice. Pick and Hide Sushi

3. Functions

In the "Functions" section, you'll delve into the powerful JavaScript feature of creating and utilizing functions to streamline your code. You'll learn how to write functions to perform specific tasks, enhancing code reusability and clarity. By practicing decomposition, you'll break down complex problems into simpler functions, mastering the art of organized and efficient coding.

Using Functions

Writing Functions

Functions Practice. Collect Pits

Functions Practice. Make Diagonals

Decomposition Practice. Collect Angles

Decomposition Practice. Move Columns

Decomposition Practice. Collect Sections

4. Loops

In the "Loops" section, you'll explore the essential JavaScript feature of loops, which allows you to execute repetitive tasks efficiently. You'll learn to implement both for loops and while loops, gaining the ability to automate actions and iterate over sequences. By mastering nested loops, you'll tackle more complex scenarios, enhancing your ability to write concise and powerful code.

For Loops Practice

5. If-Else Statements

In the "If-Else Statements" section, you'll learn how to use JavaScript's conditional logic to make decisions within your code. You'll explore how if-else statements allow your ninja to respond dynamically to different scenarios, enabling more intelligent and adaptable behavior. Through practical exercises, you'll apply these concepts to solve challenges, enhancing your ability to write responsive and decision-driven code.

If-Else Statements

If-Else Statements Practice. Roll the Sushi

If-Else Statements Practice. Clear the Storage

If-Else Statements Practice. Follow the Sushi Snake

6. Challenges

In the "Challenges" section, you'll apply your JavaScript skills to tackle a series of engaging and complex problems. These challenges will test your understanding of loops, functions, and conditional logic as you guide your ninja to align columns, build letters, and traverse intricate patterns. By solving these puzzles, you'll refine your coding abilities and gain confidence in applying JavaScript to creative and real-world scenarios.

Challenge: Build letter K

Challenge: Build letter E

Challenge: Traverse Spiral

Challenge: Align two columns