codex-lv2-may-2025

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Current Level: 3

Lesson: Read and Update POJO Properties

🎯 Objective

Practice reading object properties and updating them with new values through guided exercises.

Instructions

First, complete the Look and Guess activity.
Then complete the 3 Read and Update exercises.
Write all your answers as comments in script.js.

✅ Look and Guess

const sprite = {
    "name": "Hero",
    "x": 100,
    "y": 200
};

console.log(sprite.x);
sprite.x = 150;
console.log(sprite.x);

sprite.y = 250;
console.log(sprite.y);

// TODO: Write your guesses for each console.log as comments.

Run the file:

node script.js

✅ ACP

git add script.js
git commit -m "Step 3 Look and Guess completed"
git push

✅ Exercise 1: Read and Update a Book

const book = {
    "title": "JavaScript for Beginners",
    "author": "Jane Doe",
    "pages": 250
};

// TODO: Print the number of pages.
// TODO: Update pages to 300.
// TODO: Print pages again to confirm update.

✅ Exercise 2: Read and Update a Pet

const pet = {
    "name": "Buddy",
    "species": "Dog",
    "age": 5
};

// TODO: Print name and age.
// TODO: Change age to 6.
// TODO: Print age again.

✅ Exercise 3: Read and Update a Sprite’s Position

const sprite = {
    "name": "Hero",
    "x": 100,
    "y": 200
};

// TODO: Print x and y values.
// TODO: Update x to 120 and y to 220.
// TODO: Print x and y again.

✅ ACP

git add script.js
git commit -m "Step 3 completed - Read and Update Exercises"
git push

✅ Summary

You practiced:

Reading POJO properties using dot notation.
Updating existing properties with new values.
Observing changes by printing updated properties.

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Current Level: 3