Method objects with method() in Ruby - Mini Project: Build & Apply

Using Method Objects with method() in Ruby

📖 Scenario: You are building a simple calculator program that can reuse operations easily.

🎯 Goal: Learn how to create method objects using method() and call them later.

📋 What You'll Learn

Create a method named add that takes two numbers and returns their sum.

Create a method object from the add method using method(:add).

Call the method object with two numbers to get the sum.

Print the result of calling the method object.

💡 Why This Matters

🌍 Real World

Method objects let you treat methods like data. This helps when you want to reuse or pass around actions in your programs.

💼 Career

Understanding method objects is useful for Ruby developers working on flexible code, libraries, or frameworks that need to manipulate behavior dynamically.

1

Define the add method

Write a method named add that takes two parameters a and b and returns their sum.

Ruby

# Define the add method here
# Your code here

Need a hint?

Use def add(a, b) to start the method and a + b to return the sum.

2

Create a method object from add

Create a variable called add_method and assign it the method object of add using method(:add).

Ruby

def add(a, b)
  a + b
end

# Create add_method as a method object from add
# Your code here

Need a hint?

Use add_method = method(:add) to get the method object.

3

Call the method object with arguments

Call the method object add_method with arguments 5 and 7 and assign the result to a variable called result.

Ruby

def add(a, b)
  a + b
end

add_method = method(:add)

# Call add_method with 5 and 7 and store in result
# Your code here

Need a hint?

Use result = add_method.call(5, 7) to call the method object.

4

Print the result

Print the value of the variable result using puts.

Ruby

def add(a, b)
  a + b
end

add_method = method(:add)

result = add_method.call(5, 7)

# Print the result
# Your code here

Need a hint?

Use puts result to display the sum.