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# A simple Ruby class demonstration
class Person
attr_accessor :name, :age
def initialize(name, age)
@name = name
@age = age
end
def introduce
puts "Hi, I'm #{@name} and I am #{@age} years old."
end
def can_vote?
@age >= 18
end
end
# Module definition
module Greeter
def self.say_hello(name)
puts "Hello, #{name}!"
end
end
# Main execution
if __FILE__ == $0
alice = Person.new("Alice", 25)
alice.introduce
if alice.can_vote?
puts "#{alice.name} can vote."
else
puts "#{alice.name} cannot vote."
end
Greeter.say_hello("Bob")
# Array and block
numbers = [1, 2, 3, 4, 5]
squared = numbers.map { |n| n * n }
puts "Squared numbers: #{squared.inspect}"
# Hash
config = {
:env => "production",
:retries => 3,
:timeout => 500
}
puts "Environment: #{config[:env]}"
end
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