JSON library basics in Ruby - Mini Project: Build & Apply

JSON library basics

📖 Scenario: You are working on a small Ruby program that needs to handle data in JSON format. JSON is a common way to store and share data, like a list of items with details.

🎯 Goal: You will create a Ruby program that uses the JSON library to convert a Ruby hash into a JSON string and then print it.

📋 What You'll Learn

Use the Ruby JSON library

Create a Ruby hash with specific key-value pairs

Convert the hash to a JSON string

Print the JSON string

💡 Why This Matters

🌍 Real World

JSON is used everywhere to send data between web browsers and servers, or to save data in files. Knowing how to convert Ruby data to JSON helps you work with APIs and web services.

💼 Career

Many programming jobs require working with JSON data. This skill is essential for backend development, web development, and data processing roles.

1

Create a Ruby hash with data

Create a Ruby hash called person with these exact key-value pairs: "name" => "Alice", "age" => 30, and "city" => "New York".

Ruby

# Create the hash called person with the given keys and values
# Your code here

Need a hint?

Use curly braces {} to create a hash. Use strings as keys and values as shown.

2

Require the JSON library

Add a line to require the Ruby json library at the top of your code.

Ruby

# Require the JSON library
# Your code here

person = {"name" => "Alice", "age" => 30, "city" => "New York"}

Need a hint?

Use require 'json' to load the JSON library.

3

Convert the hash to a JSON string

Create a variable called json_string and set it to the JSON string version of the person hash using JSON.generate(person).

Ruby

require 'json'

person = {"name" => "Alice", "age" => 30, "city" => "New York"}

# Convert person hash to JSON string and store in json_string
# Your code here

Need a hint?

Use JSON.generate to convert a Ruby hash to a JSON string.

4

Print the JSON string

Write a line to print the json_string variable.

Ruby

require 'json'

person = {"name" => "Alice", "age" => 30, "city" => "New York"}

json_string = JSON.generate(person)

# Print the JSON string
# Your code here

Need a hint?

Use puts to print the JSON string.