Ruby

A dynamic, interpreted language known for its elegant syntax.

When to Use

• Web Development (Ruby on Rails)
• Scripting / Automation
• DevOps tools (Chef, Puppet)
• Prototyping

Quick Start

puts "Hello, World!"

class Greeter
  def initialize(name)
    @name = name
  end

  def say_hi
    puts "Hi #{@name}!"
  end
end

g = Greeter.new("Alice")
g.say_hi

Core Concepts

Everything is an Object

Numbers, strings, even nil are objects.

1.odd? # => true

Blocks & Iterators

Functional-style constructs for iteration.

[1, 2, 3].each do |n|
  puts n * 2
end

Metaprogramming

Writing code that writes code (used heavily in Rails).

Best Practices

Do:

• Optimize for developer happiness (readability)
• Use standard style guide (RuboCop)
• Use blocks for resource management (File.open)

Don’t:

• Overuse monkey patching (modifying core classes)
• Write “Perl-ish” Ruby (keep it clean)

References

• Ruby-Lang
• Ruby Style Guide