Enumerables and Map - Ruby Typing CST Test
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Enumerables and Map — Ruby Code
Demonstrates functional programming style using map, select, and reduce on Ruby collections.
numbers = (1..10).to_a
evens = numbers.select { |n| n.even? }
squares = numbers.map { |n| n ** 2 }
sum = numbers.reduce(:+)
puts "Even numbers: #{evens}"
puts "Squares: #{squares}"
puts "Sum: #{sum}"Ruby Language Guide
Ruby is a dynamic, object-oriented, high-level programming language designed for simplicity, productivity, and readability. It emphasizes developer happiness and convention over configuration, widely used for web development, scripting, automation, and backend systems.
Primary Use Cases
- ▸Web application development (Ruby on Rails, Sinatra)
- ▸Backend APIs and microservices
- ▸Automation and scripting
- ▸Prototyping and MVPs
- ▸DevOps tooling (Chef, Puppet)
- ▸Data processing scripts
Notable Features
- ▸Everything is an object
- ▸Dynamic typing and duck typing
- ▸Powerful metaprogramming and DSL support
- ▸Elegant and readable syntax
- ▸Convention over configuration (Rails)
- ▸Large ecosystem and gems library
Origin & Creator
Created by Yukihiro 'Matz' Matsumoto in 1995 in Japan. Designed to maximize developer happiness by blending Perl, Smalltalk, Eiffel, Ada, and Lisp influences into an elegant, readable syntax.
Industrial Note
Ruby dominates web startups, SaaS platforms, rapid prototyping, automation, and DevOps tooling (Chef, Puppet). Ruby on Rails accelerates development, making it a top choice for MVPs and web platforms like GitHub, Shopify, and Basecamp.