The super keyword in Ruby is used to call a method from a parent or superclass. This is useful when you want to override a method in a subclass and still access the original method.
For example, say you have a superclass called Animal and a subclass called Cat. The Animal class has a method called speak that prints out “Meow”.
class Animal
def speak
puts “Meow”
end
end
class Cat Purr
# => Meow
The self keyword in Ruby refers to the current instance of the class. It is used to access instance variables and methods within the class.
For example:
class Person
attr_accessor :name
def initialize(name)
@name = name
end
def say_hello
puts “Hello, my name is #{self.name}”
end
end
person = Person.new(“John”)
person.say_hello
# Output:
# Hello, my name is John
attr_accessor is a Ruby language method used to create getter and setter methods for instance variables.
For example, if you have an instance variable @name, you can use attr_accessor to create getter and setter methods for it:
class Person
attr_accessor :name
end
person = Person.new
person.name = “John”
puts person.name # => “John
The yield keyword is used to execute a block of code within a method. It is most commonly used in iterator methods, allowing you to pass a block of code to be executed for each element in the collection.
For example:
def my_method
puts “This is the start of the method”
yield
puts “This is the end of the method”
end
my_method { puts “This is the code inside the block” }
# Output:
# This is the start of the method
# This is the code inside the block
# This is the end of the method
1. Readability: Ruby is known for its ease of use and readability. Its syntax is straightforward and intuitive, making it easy to learn and understand. For example, a simple “Hello World” program in Ruby looks like this:
puts “Hello World”
2. Productivity: Ruby helps developers write code faster and more efficiently. Its concise syntax and powerful frameworks such as Rails allow developers to quickly develop applications.
3. Flexibility: Ruby is a highly flexible language that allows developers to choose the best tools for their projects. For example, developers can choose between different web frameworks such as Sinatra or Rails.
4. Popularity: Ruby is one of the most popular programming languages in the world. This means there is a large and active community of developers who can help with any questions or issues you may have.
5. Support: Ruby is supported by many platforms, such as Windows, Mac, and Linux. This makes it easy to develop and deploy Ruby applications across multiple platforms.
RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing Ruby programs and libraries (in a self-contained format called a “gem”), a tool designed to easily manage the installation of gems, and a server for distributing them.
For example, if you wanted to install a gem called ‘Faker’, you could use the command line to install it using the RubyGems package manager:
gem install faker
Ruby is a programming language that was created in 1995 by Yukihiro “Matz” Matsumoto. It is an interpreted, object-oriented language that is used to create dynamic web applications. Ruby on Rails is an open-source web application framework written in Ruby. It is designed to make the development process easier by providing a structure for all the code written in the application.
For example, if you wanted to create a web application that allowed users to log in and create their own profiles, you would need to write a lot of code in Ruby to make it happen. Ruby on Rails simplifies this process by providing a framework that already contains a lot of the code needed to create such an application. All you need to do is write the code that is specific to your application.
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
Vaibhav Kothia