I will start with a simple example where we want to have an AbstractBuilder for building Pet instances, in our example this will be a Dog. Here are the Pet class, and the Dog class that extends Pet Suppose we need a builder for building Dog instances and we know that in future there will […]
Let’s imagine we need to know exchange rates in different cities, for this we are going to the Central Bank and are asking for an entity that can give us exchange rates for specific cities. Factory CentralBank will create or will give us instances of ExchangePlace based on the city name that are passing as […]
Today we gonna talk about Decorator Pattern. Every morning, before starting work I drink coffee, sometimes with milk, sometimes with a bar of chocolate. Let’s imagine the business that seels coffee asked us to write software that will help them selling different types of coffee (Coffe with Milk, Coffe with Chocolate, Coffe with Milk and […]
This article will be pretty short. Imagine you have a weather station and you should provide weather info for other businesses and government alerting system (they will use this information for informing people). For implementing this we will use Observer pattern. Observer pattern has two parts Observable and Observer. Observable is the weather station that […]
1. Capcanele care apar la Mostenire și Compozitie Mostenirea este un principiu de baza al OOP, utilizănd mosteneria ai posibilitate sa extinzi comportamentul unui obiect. Dacă un Urs este un Mamifer, vom extinde clasa Mamifer pentru a crea clasa Urs, este comod și util pentru reutilizarea codului, problema apare atunci când moștenirea este utilizată prea […]