Category: Design - Ruby Blog

Ruby - Specification Pattern

Hi guys! I've been digging into ideas of Domain-Driven Design for a while and decided to share one cool pattern that I found in book: "Domain-Driven Design: Tackling Complexity in the Heart of Software" by Eric Evans (The Blue Book). If you haven't read this book yet - do that. Twice. Because it's so hard to get all concepts first time :) In this book Eric Evans describes Specification pattern which can make application more flexible. Today we're going to learn how to implement it.

17 February 2017
Ruby Design
Object-Oriented Programming: Polymorphism

Last week we discussed encapsulation and inheritance. Today we will discuss last part of basics of Object-Oriented Programming: Polymorphism.

03 January 2017
Ruby Design
Object-Oriented Programming: Encapsulation and Inheritance

Ruby - it's an object-oriented language. If we want to understand ideas that Matz put into Ruby - we should understand basics of object-oriented programming (OOP). In this post I'll cover encapsulation and inheritance. I'll devote separate post for polymorphism.

Ruby - Factory Method pattern

Hey! I wrote couple posts about patterns (strategy, decorator and template). This list can not be complete without Factory Method pattern.

Ruby - Dependency Injection

Hi there. Today we will discover Dependency Injection (DI). To understand all benefits of dependency injection we should understand why dependencies are bad.

Command-Query Separation

Today's post will be more theoretical rather than practical. But it's worth reading because Command-Query Separation allows you to improve design of methods. So today we will discuss CQS.

Ruby - Strategy Pattern

Hi, today we will continue learning new patterns (see also: decorator and template). This time we will go through very popular pattern - Strategy.

07 October 2016
Patterns Ruby Design
Decorator pattern and usage of SimpleDelegator

Recently I wrote about template pattern. Today I would like to talk about another useful pattern - decorator.

04 October 2016
Patterns Ruby Design
Inheritance and template pattern - simple example

Today I would like to show by simple example how to use template pattern in Ruby.

I'm sure you will find many ways of using that pattern in your application.