Accessing and setting values in Ruby - Mini Project: Build & Apply

Accessing and setting values

📖 Scenario: You are managing a small store's inventory using a Ruby program. You need to keep track of the quantity of different fruits available.

🎯 Goal: Build a Ruby program that creates a hash with fruit quantities, updates the quantity of one fruit, and then prints the updated quantity.

📋 What You'll Learn

Create a hash named inventory with exact keys and values

Create a variable named fruit_to_update with the exact string value

Update the quantity of the fruit in the inventory hash using the variable

Print the updated quantity of the fruit using puts

💡 Why This Matters

🌍 Real World

Managing inventory quantities in a store or warehouse is a common task. Using hashes to store and update product counts helps keep track of stock easily.

💼 Career

Many programming jobs require working with data structures like hashes or dictionaries to manage and update information efficiently.

1

Create the inventory hash

Create a hash called inventory with these exact entries: 'apple' => 10, 'banana' => 5, 'orange' => 8

Ruby

# Create the inventory hash with exact fruit quantities
# Your code here

Need a hint?

Use curly braces {} to create a hash and separate keys and values with =>.

2

Set the fruit to update

Create a variable called fruit_to_update and set it to the string 'banana'

Ruby

inventory = { 'apple' => 10, 'banana' => 5, 'orange' => 8 }
# Create the variable fruit_to_update with value 'banana'
# Your code here

Need a hint?

Use = to assign the string 'banana' to the variable fruit_to_update.

3

Update the quantity of the selected fruit

Increase the quantity of the fruit stored in fruit_to_update by 3 in the inventory hash

Ruby

inventory = { 'apple' => 10, 'banana' => 5, 'orange' => 8 }
fruit_to_update = 'banana'
# Increase the quantity of fruit_to_update by 3
# Your code here

Need a hint?

Use inventory[fruit_to_update] to access the value and add 3 to it.

4

Print the updated quantity

Use puts to print the updated quantity of the fruit stored in fruit_to_update from the inventory hash

Ruby

inventory = { 'apple' => 10, 'banana' => 5, 'orange' => 8 }
fruit_to_update = 'banana'
inventory[fruit_to_update] += 3
# Print the updated quantity of fruit_to_update
# Your code here

Need a hint?

Use puts inventory[fruit_to_update] to print the updated quantity.