What is the purpose of the initialize method in Ruby?

Vaibhav Kothia May 31, 2023 0 Comments

The initialize method is a special method in Ruby that is automatically called when an object is created. It can be used to set up or initialize any variables that the object will need when it is created.

For example, if you were creating a class to represent a Person, you might use the initialize method to set the person’s name and age:

class Person
def initialize(name, age)
@name = name
@age = age
end
end

person = Person.new(“John”, 30)
puts person.inspect #

What is the difference between a class and a module in Ruby?

Vaibhav Kothia May 31, 2023 0 Comments

A class is an object-oriented programming construct that is used to define a type of object. It defines both the data and the behavior of the objects of that type. Classes are the building blocks of object-oriented programming.

Example:

class Dog
attr_accessor :name, :breed
def initialize(name, breed)
@name = name
@breed = breed
end
end

A module is a collection of methods and constants that can be included in classes. It is used to provide a namespace and prevent name clashes between similarly named methods.

Example:

module Dog
def bark
puts “Woof!”
end
end

How do you debug a Ruby program?

Vaibhav Kothia May 26, 2023 0 Comments

Debugging a Ruby program can be done in a variety of ways. Here is an example of how to debug a Ruby program using the built-in Ruby debugger:

1. Start the debugger by running the program with the -r option:

$ ruby -r debug your_program.rb

2. Set a breakpoint at the line of code you want to debug:

(rdb:1) break

3. Run the program:

(rdb:1) continue

4. Execute the commands you want to test:

(rdb:1)

5. Step through the program and inspect variables:

(rdb:1) step

(rdb:1) list

(rdb:1) info variables

6. When you are done debugging, quit the debugger:

(rdb:1) quit

What is Ruby?

Vaibhav Kothia May 26, 2023 0 Comments

Ruby is an open-source, object-oriented programming language. It was created in the mid-1990s by Yukihiro Matsumoto in Japan. Ruby is used for building web applications, websites, and other software.

Example:

# Create a new class called “Person”
class Person

# Define an initialize method to set the name
def initialize(name)
@name = name
end

# Define a method to greet the person
def greet
puts “Hello, my name is #{@name}!”
end
end

# Create a new person object
person = Person.new(“John”)

# Call the greet method
person.greet